My 22 year old eldest son has struggled with his mental health for many years now. When he came home from uni in the Summer things went from pleasant to terrible between us in a matter of weeks. Without any obvious trigger he started to behave like he hated me, expressed that he had an unhappy childhood that he is struggling to get over, hates my partner ( of 14 years with whom my relationship is also crumbling), and doesn't feel part of the family ( he has a much younger half brother and sister). Since going back to uni in September he has ignored nearly all my calls and only replies to texts if he needs something. He says he is not coming back for xmas. I have no idea where he is planning to be or who with, if anyone. I'm hurting so much. The thought of xmas without him is hard to contemplate. I had no idea he felt this way towards me. But the worst thing is that I know he must be hurting too and I can't help as I have been alienated. I have no idea how to be dealing with this situation and feel completely lost.