Is love suppose to hurt??

Terra
I been with my boyfriend for a little over 5 months and he has been dogging me out when I sit here and be faithful to him when he is out here cheating on me and he says he wants me and only me and that none of them don't mean nothing to him is he telling the truth?? Anf he shows me love and effection at times but he knows I know wat he is doing I love this man so much what should I really do??