My experience was all but the same. I was 15 and he was 20!! It hurt so bad and I refused to do it again with him. I never heard from him again. (the A-hole didnt even respect me enough to pull out and I was not on birth control)
I have my regrets as well. I wish I could say something magical and wonderful to make you feel better. All I can do is offer a hug and tell you not to be to hard on yourself. Guys are really good at the pressure game.