I'm very sorry to hear that and although I personally cannot relate exactly, a couple people in my family have been sexually assaulted and I know its something that stays with you... however, I agree with tauran about the counseling with someone who specializes in that. It hasn't affected them as bad as your handling it but everyone is different so there's absolutely nothing wrong with how your handling it, there's not right or wrong way to handle these types of situations in my opinion however it is affecting how your living && your happiness it seems like, so you want to try and get some help to become comfortable and be able to be open with someone you may become close with in the future because intimacy may be something special to them and maybe you can get to the point where your no longer thinking about it negatively... its just shame that things like this happen to people because it can really mess with someone, and affect there life... I really hope you find a way through this and I'm rooting for you!
I am hoping that I am not alone with this problem, really kills me everyday.

Your not alone! Never were... at the end of the day your strong to have endured what you did. this post seriously made my heart drop but it also tells me that your someone who possesses A LOT of strength! there are understanding people out willing to work with you on this, as far as being in a relationship goes.. if its hard for someone to understand or respect how you feel when it comes to that specific act then they weren't the one for you anyways... keep your head up! your extremely special, know that
Wish u the best with this and if you ever want to talk again we can.