I have only been in two relationships, although the first one wasn't so much a real relationship as it was a forced relationship where I had no choice in it at all from the very start, including the decision to start the relationship, so I don't really think that is a relationship. The second one was my attempt at having a real relationship which didn't really work out for different reasons. The guy was a great guy, he was actually one of my close friends, but I just couldn't connect with him on a relationship level. Every time I tried to be close with him, and I don't mean anything serious like sex, but just something as simple as hugging or kissing him, I would just feel myself shutting down, I just couldn't do it. That relationship last two weeks before I broke it off because I just couldn't handle it. Since then, I went a few first dates but I just couldn't do it. I couldn't do it to myself and I couldn't do it to them either.
I can't be intimate at all. I can have sex with someone but it's because I do it as a form of self-harm, and I don't have to connect with someone to have sex with them. The moment I have to connect with them though is when everything comes collapsing in on me. Intimacy scares the crap out of me, even just sitting here and typing it, I feel anxious and having flashbacks.
For me, being in a relationship just seems like a selfish thing to do. I know I have problems, and they are my problems I have to deal with. If I were to be in a relationship, it would mean that all or at least some of my problems would now become his problems, and I just don't think it's fair to do that. I don't feel it would be fair or right to dump my problems on him when he has nothing to do with them. And when I say 'dump my problems' I don't mean to make it their job to fix me, but I just don't want them to suffer due to my problems. I mean I wouldn't be able to be close with them, or it would probably take a really long time before I could be close with them, and to make someone else have to suffer through that, among other things, is just selfish, in my eyes. I don't want to be the reason/source of someone else's pain.
I also worry that if I were to get into a relationship, and do tell them about my problems and/or my past, they will just run. No one would want to have to know or deal with my issues, and to make them aware of it would just be too scary for them and they are going to run. So to avoid that, I find it easier to just avoid the whole thing together, and avoid the embarrassment and let down that would inevitably come to be. I also don't want to get attached to them and be open with them, only to have them leave me. If anyone were to know my trauma, or know about all the stuff I did during it, or after it (promiscuity), they would want to stay a mile away from me. To not be in a relationship, is to avoid that let down.
I also don't want to go into a relationship, only to end up into some abusive relationship, because I know if it happens, I won't put up any resistance and would just take it, because it's what I've always done.
I just feel it's better for everyone if I just stay by myself. There are other reasons, but those are the main ones.