Help me what should I do and do you think he will come back? My boyfriend broke up with me 2 days ago?

You and him were friends for 3 years. Then you two dated for 8 months. Maybe you was a rebound relationship. Maybe he is sad it ended with his ex wife. Maybe he thought he could keep her as his wife and you as his gf. I dont see him wanting to work this out but maybe he will.