You might not, especially since this is a pretty common thing. You made a small mistake, but it could have been SO much worse, as has been said.

I'm proud of you for not letting him do more!! Fact is, you're a woman, your body IS a temple, and whatever guy you're with HAS TO RESPECT THAT. This guy sounds like a total jerk/a**hole, and I'd get out of anything resembling a relationship you have with him right away. He seems like the type who just uses girls for pleasure and then dumps 'em, if I may presume.
You're not a *****, honey. You got into a situation that a lot of women don't handle as well as you did, and you basically got yourself out of it. Be proud, and DON'T let him pressure you again!!!
luck&love,
~muse