Bi-polar ex 

I really dont know where to begin, 1 month after i left the house (for the last time) my stbx moved 60 miles away to move in with a guy she only knew for a couple weeks! Took the kids out of the school and enrolled them in a new school. 2 months later she called me crying saying he wasen't right for her. (duh) She moved into a place herself I managed to get the kids back in their original school and now he's moved in with her! She's bi-polar and i understand when the kids are with her there's not much i can do. I fought for custody of the kids, to no prevail though. I hate to see my kids go through this and then she asks me why i don't want to be friends with her. I know im ranting and im new to this..thanks