Is this OCD?

Today, I stood in line at Chipotle. Some girl was standing close behind me while talking to her friends. The line moved. I moved. The girl took a step, and her leg touched mine, and I noticed that there was about a foot of space on the side of me where the girl was not. I felt a pang of nervousness, from not having my personal space, and I had a sexual thought immediately after. The sexual thought triggered a tingle in my genitals and then the server asked me what I wanted to order and I was distracted and that went away.

That exact same thing with the leg touch happened on a public bus once. Sometimes, if a girl who I don't know well looks at me too long (like more than one second), I'll start wondering what she's thinking or why she's looking at me and then I'll have an intimate or sexual thought about her. I typically then start fantasizing about her sexually and thinking about her during masturbation. If I over-think the initial touch or eye contact, I'll start to feel like I need to know why she looked at me or touched me or why she made some peculiar comment and then I'll assume that she must like me and that I must try to hit on her. But then I won't want to hit on her, but I'll ask her to go see something on campus or have lunch or what not out of some obligation based on that assumption. I'll feel really awkward but I'll also feel like it's my duty to do so - that I can make something happen. And then when it doesn't work out - no chemistry, nervous conversation and the like, I'll reminisce on what I did wrong or what went wrong or what I could have done differently or if that long stare meant anything. I'll relive every detail over and over again in hopes of finding some secret that could have resulted in love (even though no such secret detail exists).

Sometimes, I'll try to force myself to only think about abstract, fantasy people rather than actual people during my sexual fantasies because I tend to obsess over real people who I imagine myself f*cking. Or if I know that I'm developing a crush or an obsession with someone, I'll avoid them or avoid thinking about or fantasizing about them to make the obsession go away. Either that, or I'll constantly bug them or try to confess my feelings and find out "what went wrong" or "how I can fix it".

Sometimes my libido gets really high and I masturbate a lot. Like I will find myself rushing to a public restroom stall to blow my load into the toilet as quietly as I can. Like once, when I was 13, a female friend took my textbook while I wasn't looking and turned around so that I had to get right behind her back to wrestle it from her arms (girls were bigger than guys in middle school). Anyway, in the process of trying to get the book, I cupped her breasts and felt an overwhelming jolt go from my hands, down my arms, down my chest and into my genitals. Sort of like the small jolt I got when that girl at Chipotle stood too close and touched my leg against her leg, but this jolt was 10000 times stronger. I immediately became erect and awkwardly ran away to the nearest boy's bathroom. After that, I fantasized about her every day. In my fantasies, she intentionally took my book and had me wrestle it from behind her in order to make me press myself against her. I masturbated to her constantly, and I became obsessed with her. But then I started avoiding her, and she asked me why and I couldn't answer. I feel like I go through this sort of thing again and again.

Is it OCD? Or just anxiety? Or do I just have a very high libido that gets triggered by the slightest thing? I've had some moderate-to-severe depression at one point and my father's father has type I bipolar, so I originally thought that when the hypersexuality was at its peak and I had three simultaneous obsessions who I masturbated to multiple times a day (not including all the other people and things that I masturbated too, including squirrels having sex or chasing one another in empty, grassy areas), that it was the hyper-sexuality associated with bipolar mania. But a therapist suggested that the hypersexuality and perverse sexual habits such as masturbating to squirrels in public parks might actually be associated with OCD. Personally, I don't know - I have never been a neat freak. My room is always a total mess and I avoid touching things just so that I can skip washing my hands. And I've never been one for superstitious habits like counting things. What do you think?

Oh, one last thing. I don't know if OCD is more of a continuous thing or a come and go thing, but my my obsessions and freaky periods definitely have gaps where they almost completely go away. I mean, I might still occasionally imagine myself as a talking animal and masturbate to animals having sex on YouTube, but it's usually not out of hand where I'm running around nature preserves doing it and craving sex with everything that moves. I mean one time, I literally just pet a stray cat and felt myself getting hard. *shudders*. So anyway, is that OCD?

Yes, I've had similar experiences before. This sounds like mild Pure-O. I don't have much other advice on this however, just that perhaps cutting back on masturbation etc might help. Your sex drive usually goes down after a few days of inactivity (e.g not masturbating even once).

Pure OCD? But I have no trouble with throwing anything away (I don't hoard), or obsessive neat-ness, or repeatedly flicking light switches on and off. And this sort of a thing only happens occasionally - like I go months at a time with no issues, but I thought OCD is more of a continuous problem.

Also, if you have OCD, does alcohol normally prevent the obsessive thoughts from happening? Like if you're obsessing over something like a woman, does your mind shift to non-obsessive thoughts when the alcohol kicks in? Is that an OCD thing or perhaps that just happens to everyone?

It happened again. Today, I saw a girl with bare middriffs leaning forward in her seat and checked out her (very well proportioned) ass/hips/waist. Then I felt like I've looked enough and then looked away. Then I looked at her from behind again and started to feel uncomfortable from perhaps looking too much. Then I looked away again and kept walking. Then I visualized what I had just seen, that ass/waist sitting there, and looked at the visualization in my mind. Then I made the visualization go away. And then it came back again. I made it go away one last time and then I was done, although I felt a little uneasy from too much staring at ass, even though the second two times that ass was just in my head.