background - Fiance and I have been together three years and engaged since NYE. Wedding is supposed to be in April.
Tonight, out of what seemed like nowhere, he told me he is leaving me and going to live at his mum's on Sunday (she lives several hours away). The past few weeks we have been talking about plans for christmas with my DC (not his) and plans for the new year as well as wedding plans. I have been thinking about it the past few hours and cannot think of what went wrong, nothing has been different that I have noticed. He admitted he has been thinking of this for the past several weeks but 'hadn't decided'. He said he would leave on Sunday and he is leaving me $300 (which has made me feel even worse) and then asked me what he should say to my son who adores him. I told him I didn't know.
I just feel so broken. It is almost 1am where I am and I spoke to a friend for a little while but she is an optimist and seems to think 'he will come around, he loves you too much etc etc'. I can't sleep and just feel broken. I really don't know what to do or why he has chosen this.