As long as he's still with her, he will never fully be with you so don't keep insinuating yourself in their life. He is not thinking he didn't make the right choice, you're just pushing yourself on him and it's confusing him in his time of need. If he wanted you, he would have left her because I'm pretty sure he knows you'd have him.
Let go of your ties to him and HIS MOTHER and do the necessary no contact to get on with your life without him in it. His mother keeping in touch with you when he's with a new woman is really disconcerting TBH. If I was him I'd be asking her to sever ties with you so that you can move on.
Leave them alone now... zero contact. If he wants you he knows where to find you and if/when he finds you, you best tell him to stop contacting you unless he wants to be with you as your boyfriend. Obviously you're unable to be a platonic friend when you are still so romantically emotionally tied to him.. You are not a friend who does not have ulterior motives.
Last edited by Wakeup; 24-12-14 at 05:46 PM.
“The willingness to accept responsibility for one’s own life is the source from which self-respect springs.” ~Joan Didion