Hella,

It seems there are several things going on with you: 1) your sense of betrayal and anger towards your ex, 2) the common social group that embraces him which reminds you of your anger because they don’t know the “real” him and that his gf is part of this same group.

It sounds really hard to move on since he and his girlfriend is ever present in your common social group. I can understand the anger since he not only broke up with you for a girl that he never really seemed to have left, he took away your social group as well.  Plus you are angry because he never took responsibility for his part that contributed to your pain.

Did I get that right?

Mark