I think this needs to be said and I don't know how you'll take it.

He was repressing a side of him that started to come to life with B. In that moment he probably felt the crazy frenzy feeling of sexual excitement you have with yout first experience. Everyone has mentioned he broke rules, this may be true. However, he only knows affection that includes kissing foreheads. This isn't meant to show he is being disrespectful in the slightest, he probably didn't know what else to do.

How many people start a crazy intense relationship and want to spend as much time with this other person that you're equally horny with? How many of you went against curfew? Snuck out at night? Did something against your parents wishes? All because you were caught up in the moment and wanted to explore whats happening.

You need help, and this is understandable. I can't help you come to terms with your feelings or your relationship with your guy. But hopefully looking at this from a different angle might help, even just a little.