I'd date a girl who didn't want to have sex before marriage if I really liked her (and thought there was a chance of making it to marriage!). Are you a christian because if not I can't really understand the rationale behind the decision. Not having one night stands or short term relationships I can understand, but no sex before marriage full stop seems a bit pointless to me seeing how many divorces there are nowadays.
EDIT: As long as you aren't some weirdo who's freaked out by sex like that woman in On Chesil Beach!
Yep, im a Christian.... I have been in near situtions with the guys I have been in relationships with (I'm human). Though, I do wish to keep my virginity until I'm married.