I haven't been alone for longer than 6 months in the last five years, alone meaning not in a relationship. Every time I am I run back to the comfort of one of my ex girlfriends after 3 or 4 months. I become friends with them again. Well, normally that wouldn't be a bad thing because I could stay friends with them. The problem is that the ex I run back to has issues and she refuses to work through them

I've put my ex fiancee out of my life entirely but I've hit that point again where I want to talk to my ex girlfriend because she wasn't just my ex she was my best friend and my support system. I stopped talking to her about 4 months ago because she said something that was just... pure evil. She admitted she needed help but refuse to get it. I'm not in love with her but I really love her and miss her.
I'm just starting to feel really lonely. For five years I had someone sleeping in bed with me almost every night. Now I don't like to sleep because my bed feels cold and empty. I'm having trouble working through that and through feeling lonely, trying not to run to my ex for comfort.

I just wanted to vent and ask any suggestions?