Most Helpful Guy
I'll tell you what you shouldn't do to keep him happy. Be with him. He obviously doesn't care enough about you to completely disregard your feelings like that. He's not losing sleep by getting with this other girl. I know you don't want to hear this but you should break up with him. If you stay with him he'll have you wrapped around his little finger.
Most Helpful Girl
Talk to him about it. if not beat him to it and dump his ass of