I think you need to stop thinking she needs to be "fixed." I find it objectifying and demeaning.

I agree with everything Confusedinomicom said. Her experience was extremely traumatizing for her. Not only has she equated sex with mental pain, but also physical pain (her mind is going to remember that it hurt, expect it to hurt again, clench up, and make it hurt worse), and the two of those together is enough to put anyone off it forever. I think you need to start trying to see the issue from her perspective. How would you feel in her place? I agree, I think you should help her find a therapist to help her process her experience. By continually getting frustrated over it, you're just making her feel worse and actually reenforcing the idea that the only important thing about her is her vagina, which in her mind is a piece of crap because someone else left her over it. Honestly, even if you do wait until you are married, I wouldn't be surprised if she had the same reaction.

Another point to consider, stop thinking that someone else had intimacy with her. Because, clearly, that didn't happen. You're still in college, you're young, you have the rest of your life to have sex. Don't put so much immediacy on it that you forget why you want to be with her in the first place.