Sorry to hear this mate.

All I can tell you is not to let your anger get to you. Because if you do you'll become the one thing that hurt you. Be better than that. You don't need to walk around pissed off and scared at the world just to have some false sense of security. Because at the end of the day it's all a lie. You just go out, and be yourself. Some people operate solely on fear and that's a sad thing. But don't let that rub off on you. This happens way too often to good people man.

The other thing is that you got sprung. It happens sometimes but you just have to remember your own needs as well as you girlfriend's. I know you wanted to help but you have to help yourself too. It'll be hard but you have to move on. Life keeps moving and you should too. Go out into the world a little wiser and a little stronger.