Bipolar Depression

Hi everyone. I stumbled on this site by typing “bipolar wife” into Google.
I have been with my wife for seven years, married for 6. She has 2 kids from a previous marriage and one with me. She was diagnosed with bipolar and manic depression. She was severely abused, mentally, physically, and sexually as a child. She is taking medication and was going to counseling. Last year she went out with her friends, got arrested for assault (she ended up getting probation), then tried to kill herself two weeks after she was arrested. She was hospitalized for two weeks. About a month after that she left me, for the third time, to live with one of her girl friends. After a couple of months, she got her own place. She wanted to split up, but when I started the divorce process she changed her mind and moved back in.
. In the year she has been in therapy, she refuses to talk about or work on the abuse she suffered as a child. Yesterday, we had a joint counseling session. She read a letter to me. She said that she loves me but can’t live with me, the same thing she said last time. She refuses to compromise on anything, saying she has already compromised and I’m doing nothing. She wants a divorce. Two weeks ago she told me she loved me more than anyone and would probably be in jail if she hadn’t met me. She runs in 6-8 week cycles. She’ll be fine, tell me she loves and I’m the best thing that happened to her, then she’ll want to leave saying she is starting to resent me and doesn’t want to end up hating me.
I am at the end of my rope. I think the hardest part is not blaming myself. She says that she has tried and tried and I have done nothing. She has changed, but I haven’t. This is the fourth therapist she has been to, and quit. As bad as it sounds, I feel better after reading everyone’s experiences. I thought it was just me, and I was the one causing the problem. It’s just nice to know that there are other people going through what I am, knowing I’m not an anomaly.
Anyway thanks for listening.