less Relationship - Help?

I'm starting my 3rd year of college in a few weeks, and I've been with my girlfriend for four years. In this time, we have never had or done anything remotely ual. I've never seen her naked, and we have never touched each others' intimate areas. We went on a trip this year and made a pact that we'd finally have during it, but once we got there she changed her mind. I know she is disgusted by pretty much anything other than traditional (no s, oral, , etc) so we can't compromise there. We've been together so long because I always think the day is just around the corner, but every time I see her I just leave disappointed. But I love her very much and don't want someone else - I just want her to stop being weird. What can I do?