I feel that waiting until marriage is a huge mistake. What if you two aren't sexually compatible? For me, sex is a huge part of any potential relationship, as in it has to be good in order for things to work out. Intimacy is a major part of any successful relationship, believe me. I tried dating a guy who was terrible in bed and it didn't work for me. I couldn't keep going, so I let him go.

Like Tisha said, you have bigger issues going on here. It's not about celibacy, but about a fear of growing up and intimacy. You just want it all to magically happen on the wedding night, when that's not how a good functioning relationship works.

I would seek therapy for your issues and hold off on relationships until you have things figured out from there. Good luck!