We've been off and on for 8 years and we've just got engaged in October 2015. His family keeps inviting his ex girl to special occasions (birthdays, Fourth of July) and my Fiancé makes little effort to tell them how disrespectful it is to me. What makes matters worse is that he has no problem kicking with her along with his family. Since we've been together, he has cheated on me with her a few times and even had a pregnancy scare with her ( he wasn't the father).
He keeps trying to convince me that he don't care about her and that he is there for his family, so he continues to go regardless of how it hurts me. He said I was being selfish and said I wanted him to stay away from his family and that makes me feel so terrible to the point that I force myself to accept that he is going to be around her. The main reason we've been off and on was because of him being around that girl. He says all the time," Why would I propose to you if I wanted my ex?" Am I overreacting ?