I know it's inevitable and there is nothing to do about it, but my son, who lives with me, informed me that my x's boyfriend is now spending the night with her. Her relationship with him is the primary cause of our divorce even though she told me their relationship was over. It's something every divorcee has to go through but I'm having a tough time dealing with it. I laid awake all night last night. I don't even want her anymore but why am I so sad?