My boyfriend knows I don't like him to go out and drinking a lot. I'm happy for him to have one or two bottles of alcohol though.

He knows I don't like it because my last boyfriend went out drinking a whole lot and always cheated on me when he got drunk.

Anyway he went out last night and he drank a LOT so now I'm really upset about it and not really sure what I should do. Should I be upset about this or am I over reacting? What would you do in my position?