Would love to help someone solve their mind related issues.

My friend absolutely terrifies me. He has never done anything violent or harmful to me and is the most gentle and peaceful person I know (Though he is quite distant). He is also the most dangerous person I know. He usually has a calming air about him. It's calming to the point where he picked a bee off a flower and held it in his open palm for who knows how long before he sent it back on the flower without it stinging him. However, his air about him changes to absolute dread when he gets aggressive. This dread caused a dog to whimper and hide just by being near him. A moment to feel this dread is to ask him about his past.

My friend has a rather dark past. He had drug addict, alcoholic, and sick parents for the first three years of his life who were constantly fighting. He also was being watched by his legally crazy grandparents who were also drug addict alcoholics. He saw his mother brutally die in front of him from a car accident he was in. His father legally died then came back into a coma. He was physically, emotionally, and psychologically abused. He was raped. He was constantly being bullied at school and at home by his cousins. He hasn't seen his sister for ten years. He almost died countless times. He was also taken away from his father by the CPS. I was his first friend ever, and that was in the 5th grade (He was held back one year). I am still one of his only friends. The bullying never really stopped, it's just that everyone was to scared to.

As I said before, he is the best person I have ever met. However, he becomes a monster when aggressive. During these moments, he is not angry in any way. He is actually very happy when he is aggressive. I have seen him do some monster like things when he is like that. Ranging from will his way through a sleep hold to overpowering four football players. A note to take is how he is a 5' 5" 135 lbs slender-athletic build guy who isn't very bulky despite his martial art training, but he is stronger than he looks and is very resilient. When he becomes aggressive, his entire being changes. His eyes become empty and have a death stare, his body language becomes feral and relaxed, He gets a joker like smile and tries to keep himself from giggling and almost growls, the air around him becomes full of dread, and his already efficient and dangerous fighting style becomes even more efficient and dangerous. When he is in a fight, killing an insect, or gutting a hunted animal he laughs harder and smiles harder. He clearly enjoys being hit or hurting things when he is in that state. He also doesn't feel any physical pain in that state. After he snaps back to normal, he bursts into a crying mess, and will often vanish when we all check to see if the guy he was fighting is okay.

When he is normal, he has noble body language, a gentle look on his face, and love in his eyes. He will try to never harm anything and will resolve anything peacefully. He also genuinely cares about his few friends and gives amazing advise and can console anyone.

My friend has gone to therapy, but the fact he couldn't remember what he did in the aggressive moment, the therapy didn't help him know what was wrong with him. He also went to anger management, but he apparently has an outstanding control over his anger. We both wonder what is wrong with him, and I am absolutely terrified of him even when he isn't in his aggressive state.

So i've never written a post ever on any forum, ever, and since things have changed for me recently, i'd decide to give this a go. Might not come back to this but i want to get whats in my head out there and see if anyone has anything to say about me and my problems.
My problems: I care about my family too much. I'm almost certain that I have depression, mild anxiety and a myriad of other mental health problems but I've never been properly diagnosed because I care about my family too much to have them worry about me at all. I also come from a culture where mental health is not a 'real' problem, but rather a thing for the weak or the bored.
I think about death a lot BUT i'm not suicidal. I'm fine with death and i'm not scared of it but I would never be able to go through with it as long as my parents are alive because I can't put them through all that pain. If they died though, I would have not much of a reason to keep going, but that is not the point of this post.
I've always been very aware of my issues and i've always been able to talk myself down in my head like there was a third person that tells the two conflicting voices in my head what to do. This third voice sounds like a trusty friend, insightful parent, or even a advising counsellor, when i think about it. This voice knows what people views as normal and suppresses my arguing voices to make me seem 'normal'. It usually takes effort but I know it works because everyone thinks I'm still this smiley, happy girl, which really hasn't been the case since about 7 years ago (when my first encounter of death in the family happened)
My dog (who's been with me for almost 15 years) died yesterday and I was sad but it wasn't a fearful, regretful sadness. It was more of a "i'll miss you" and "we've spent good time together" happy sadness, though it was really sudden and shocking. I still miss him but I don't think I'm doing too bad. My parents on the other hand haven't been able to sleep, eat, not spontaneously cry, and not talk about morbidity every couple of hours. They also hug me a lot because they think its comforting for me, and probably themselves too.
I guess what I'm saying is that is it weird that I'm so aware of what I'm almost sure I have? Does this mean I don't have these mental health issues because it doesn't really affect my daily life and I know what triggers it, how to control it, and what works/doesn't work? Do other people with mental health issues experience this too?
An analogy (if you're still reading): I deal with my problems like dealing with my period. When it starts, I know what I can do to not let it leak out for the world to see. I know what the best way to deal with the dirty pad/tampon is, to chuck it out (feeling all my feelings/non-feelings but in a physical location where no one will see me then throw them out or at least leave them where they can't be seen). I clean up after myself and flush the bloody mess away (make sure no one can physically see or pick out that I have problems at any point of any time)
What do you think?

I just don't understand my "family". I leave my purse and wallet out on the table and they come and go through it. They just pick my wallet up and flip through my check book. And when I said something my grandmother got mad. She just got mad and smarted me off, then walked away. It's like this all the time, it's like I'm supposed to let them run over me and do or say whatever they want about me or my stuff, and if I say anything I'm a bitch or I don't know what I'm talking about. Honestly it makes me sick just to be here. Sometimes I just feel like I can't take it anymore, like my time is over and I should just commit suicide.

I'm 20 and during school break one night decided to masturbate to some porn , and I came across this video and the pornstar looked alot like my mom , the actress had the same hair style my mom always wears and the pornstar was giving oral i like watching oral but she looked to much like my mom so I fast forward to where the porn star is riding the male pornstar and this reminded me of when I was a kid and my mom and her boyfriend would lock themselves in a room for hours and I thought to my self when I was masturbating that this is probably what they were doing , so I imagined the porn stars doing it in the room and this turned me on, but then I thought that it was gross cause that's what my mom and her boyfriend were doing , so I focused more on the porn star lady cause I just wanted to finish and go to bed , but now I feel like I jacked off to my mom and her boyfriend because It did arouse me a little but I tried finishing to the porn star , I feel sick , I hate that it turned me and that I didn't stop masturbating , I feel horrible , I was never attracted to my mom and I mastorbated that day because I was horny not cause I wanted to jack off to my mom but that video ****** it up , now I feel ashamed , this is serious , please HELP!