Hey Dan, I've read the entire topic and i noticed that i could relate to almost everything you wrote in your posts here.
I've been on this forum for a year now. Mostly on the Body dysmorphic disorder section and a bit on the Social phobia and Avpd sections, because that's what i've been diagnosed with 2 years ago.
I always focused on BDD because i think i wanted to see that as my main problem and it's a nice distraction from real life i guess.
I can now see it's only a symptom of my deep rooted feelings of inferiority (BDD = 'just' believing that you're ugly -> gives massive anxiety/self-consciousness -> obsession with camouflaging your (perceived) appearance related flaws, constantly having to check mirrors, compulsively 'fixing' yourself in front of the mirror or any reflective surface available.
I always felt a sense that those disorders (avoidant personality disorder and body dysmorphic disorder) didn't comprise my whole thinking processes. A lot of it does of course, but there is another side of me that i successfully keep hidden from almost everyone i know. I guess you know what i'm referring too.
Classical BDD is the extreme fear of being ugly. This is also the way i've always described my fears to psychologists and psychiatrists. (Like i have no ego that bugged me and have (only) constant painful feelings of inferiority. Nothing else. The feelings of worthlessness are always there though, but my brain found ways to numb them, temporarily, by doing compulsions. They always come back.) But i knew this was not and never been the real issue. It's partially true that i fear being ugly, but that's not really the main thing that's on my mind when i'm around people because i know that i don't look disgustingly ugly.
Avpd is caused by an extreme fear of not being accepted or liked by other people. This is also partially the case for me, because being liked, for me, is a part of getting the kind of admiration i need.
I fear not being admired or being average. In looks as well as in behavior.
Nobody sees this though because i never show it in my behavior. I act friendly, accepting and empathetic towards the people i want to get loved and admired by. (I want to get liked as well, but that's not good enough). I ignore the rest. Their opinion doesn't matter to me.
I've read somewhere that the main difference between Avpd and Npd is that Avpd'ers fear not being accepted and Npd'ers fear not being admired. I guess i fear both.
It started out by being desperate to get accepted by my peers, but i lacked the skills and 'features' i guess, so it didn't work. I can see that now, but i interpreted it as that i didn't have any worth. I couldn't deal with those feelings.
The only option i felt i had was to transform in whatever it was that people liked, so i got obsessed by modifying my behavior and my appearance, always having to hide my true self, being hyper vigilant of my behavior, constantly monitoring every move i made in front of people while not allowing myself to show the social anxiety and constant fear of failure i felt because that would come across as weak and unattractive. Hiding, acting and resting is all i did from then on.
This coping mechanism worked very well to get the attention that i needed, i got admired, but it didn't solve anything in the long run, because nobody ever saw the real me after i was 13 anymore, so it was my facade that got liked and admired, while i got more and more detached from my true self.
The obsession was draining but i didn't know any other way to feel "good" as i got addicted to the feeling of my facade getting accepted/admired. It also gave me negative feelings and bitterness towards humanity in general. "Ah, so NOW you like me, huh?". "NOW i'm good enough?".
So i ended up with a pseudo sense of worth, which was better than the alternative at that time, but it came with high costs.
The real me never got accepted so the fear that people could see through my act terrified me. I had to be extremely good in what i did, fighting my true self to the point i don't feel like i can connect to it anymore now 10 years later. (i'm 23 years old).
I have no sense of self (i think). I don't know what that feels like.
As far as empathy goes, i get praised a lot for my ability to empathize. People love to get understood by a young guy. But i'm not sure anymore. It's easy for me to put myself in somebody else's shoes, but do i really care about their pain like other people do or do i just use it as a tool to get people to accept, admire and keep them with me?
I have a very select group of people in my life that i really care about. But just as you, i'm worried, because apparently people like me aren't able to love people like normal people do if i can be labeled with this disorder, which i'm trying to find out. That idea really worries me.
I mentioned it in group therapy once 3 weeks ago (at my last day there), but they all thought it was ridiculous, because my behavior didn't match with what they believed to be narcissism is, so i didn't really elaborate on it. They ended up giving me a lot of compliments.
I was glad that my facade worked so well that they even didn't believe me when i carefully mentioned my (believed) selfishness. To be honest it only strengthened my idea that most people in general are not very insightful, blind, and don't want to see the truth.
But it also makes me doubt my own mind. "What is wrong with me? In what category of Pd's do i fall? Am i overthinking everything? Are 'normal' people more insightful then i think?" are very recurring thoughts.
I'm sure i'm not a full blown Npd'er, because i have a conscience. Cheating on my girlfriend for example would give me so much guilt that i probably wouldn't be able to function until i would confess. That's good right? Does this exclude me from Npd?

My conscience prevents me to hurt the people that i love, which are only a few. I really couldn't care less about the rest.
But then i wonder, do other 'normal' people really care about people they don't even know or are they just faking like they're all altruistic and denying their selfishness because that's what's society considers as good?
I feel like i'm rambling. Maybe i should start my own topic instead of writing my experience on yours?

I felt the urge to write here, so i did.
Did this help/can you relate in any way?