Most Helpful Girl
I'm sorry. If it ever happens to me though...
1) Think of a revenge scheme. If it can be done before rationality returns to me, then I'm going to do it and not regret it. Of course this would come with no penalty towards me.
2) Break up with him, not speak to him ever again, and warn any friends who end up dating him.
She didn't deserve you by the way. Move on to a woman who will treat you right.