From what others have said, these relationship issues have been going on for a while. I think its ridiculous that you are not going and even worse that he is, and that he is ok with his friends treating you this way. I wouldnt stand for it. If his son has these issues and he still goes without any details and leaves it in your lap to me thats like child neglect and further demonstrates why you do not belong in a relationship with him. If you do not do something about it you will be making a choice to continue in an unhealthy relationship where you and your son are not a priority.