where do i go from here

New to this site and glad I found it. I go on wensday to file for divorce from my wife of ten years. We just found out a name (bpd) for her issues. This is something I wouldn't wish on my worst enemy. I have tried to help her and deal with her problems so long I'm questioning my on sainty. My emotions are running over right now because I feel guilty for giving up and letting her down. Our relationship has become un manageable and she is out of control. This whole thing has been a roller coaster ride with encreadable highs and the worst lows imagineable. I can't imagine not havein her in my life and I know its going to be the biggest fight yet but I just can't do this anymore. Someone please tell me that I'm not makin a huge mistake by leting her go. I know she can't help the things she does but my pain should count for something. The more she huts me the more I love her and try to fix her only to realize I can't. She sucks me in like a tornado and then blows me completelly away. Why does it have to be this way????

Bulldog, it's not your fault that things are this way. You could look for a support group or get some therapy to help you recover from everything that happened to you, especially if she was abusive.
You did what you could to help her and she probably knows she needs professional help by now. It's up to her to get it and work on her condition. You both have to move on with your lives.