I think that's about normal for your age group, where ever he is from must make the guys crazy waiting that long unless they are a virgin, so he is probably glad it's not like that here, he shouldn't think any less of you, he should be happy
guys will say "no", but statistics doesn't lie and they say yes. A girl giving in too soon is less likely to form a lasting relationship. And a girl having had a higher number of sexual partners is less likely to form a lasting marriage. Goes the other way too.
So, yes it can be a potential problem. But you have already done it, so no point worrying. better to just go with it, and hope for the best.