John, I also agree with Stan.

This is just the catalyst you need to sever the strings now. It won't change what has happened, but if you walk away and let it go, you will live better with yourself later.

Best thing I've learned you can do is to seperate yourself some the things that cause you so much grief in life. In your case, that'* living with your mother. At 18+ it'* one of those things that need to happen anyway. It'* a great maturing experience and teaches needed responsibility.