It could be your past, or you could be asexual, or both? I have a few friends who are asexual, and for them it's just... they're just not interested in sex. It doesn't appeal to them, they don't really have a desire for it, and they don't really want to deal with it. They have close friendships, and I know of an asexual woman who "dates" people, but never really has sex with them unless they want it - that would be Emillie Autumn, fyi. So not someone I "know" but I know of. (ps, Emillie Autumn's work (shes a singer/poet/performer) is really triggering, as is the story of her past. If you're easily triggered please don't submit yourself to that. She holds nothing back.)

My girlfriends sister is asexual. For her, she just never got to the point in her life where anyone became "attractive" so she just lives her life and doesn't worry about it.

One friend was in a relationship at one point, and it wasn't that he couldn't have sex or didn't get off, but that he didn't care about the sex, he cared about the person. She ended up using him then leaving him, which is sad and I think happens often.

I don't think you should worry about it. Just live the way you want to live, and don't think you need to "do" or "feel" things that you just don't. I don't think it means you won't have a fulfilling life, or fulfilling relationship with someone, just that it's not going to be the way the world would picture it. I'm getting use to living a way I want that the world doesn't quite get, so it takes some getting use to, but it's possible, and it's a lot brighter imo.

I hope that helps, and I hope I didn't misread your post. Tell me if I did, but regardless hope you're doing alright right now.