Puppy Dog Tails and Sandi etc are giving some really good advice.
I just wanted to add that when I feel really helpless, I try to channel that energy into an area that I can do something about. I notice in your first thread you said that you felt you had poor communication skills with her. Thats something you can do a lot of work on by yourself and can have quite big results.
Can I suggest you start reading up on this area? It may be that you are ok at communication, but you both have very different styles of communications, so if you can switch onto her style it can help your situation.
