He'll get over it, he's being immature. You did it with someone who meant something to you and was special... he should be relieved, most don't have that these days. It's a pretty standard age to "lose your virginity" (such an outdated phrase). You're both teens with raging hormones, I don't know what else he would expect. You have to lose your virginity at some point, I think he's just upset that this really shows you're not "daddy's little girl" anymore, you're growing up. The only thing he would have the right to be upset with would be if you didn't use protection, and even then he should speak to you in a mature way. Not this. Just let time be a healer.