I had this happen to me before (although I'm not a single mum and such). I know it's hard, but what happened is hard for them too and they may not understand how to feel/respond so they might need time or space for awhile. I'm not sure how much space this person may need, but for now I would just focus on improving yourself and make new friends if possible. I'm sorry this happened to you, it's a very hard thing to go through