I identify as asexual as well and it is something my boyfriend and I have to work with in our relationship. I have no desire for the sex related things, but I do have the desire to have a long term companion.
I really have no idea if my sexuality has been at all affected by my past abuse. It started when I was so little, that I really had no chance to develop that way beforehand.
There are so many resources on the internet. I don't have any on hand at the moment, but there are tons out there.
I know I don't like sex, but if a guy pressures me for it I will go along, because I feel like that's all I'm worth/deserve. But that's the abuse speaking, right?
That is just the abuse talking. At least that's my opinion. And people are so much more than just sex. You have many characteristics and needs, don't define yourself, or allow yourself to be defined, as just one.