Divorce Support Forums: Need help beating her to the punch (she will do it

OK I live in Fl. and have been in a relationship for 8 years not married. We own everything together and have a 6 1/2 year old little girl. We have had our problems. It boils down to this. I have a need for approval and praise. She feels that I owe it to her to do ALL the housework because she works a lot (so do I). I get no respect or thank you for all that I do (Yes I am a man that does ALL the house work). Over the years this has made us shut down. Now we get in a fight and she will not go to counseling or do anything for a last try to save it. Come to find out she has the hots for a friend of mine that just got out of prison (she is 40). I was letting him stay in our house to help him get back on his feet. She is sleeping with his as I write this. She had told me that if I am willing to hangout and let her do her thing that she would sort out her feeling and come back to me and we could go to counseling later (YEA RIGHT). Now at this point it is over. Sorry I had to let the story out so you know some of the details to help me with this information.
Now she was a foster parent for years and knows most of the laws inside and out. I know how she can be and if I do anything to try to fight her she will cheat and file an injunction on me (god be my witness I have never hit her) or find some other way to screw me. I'm already just going to walk away with just the things that are mine and leave her the house, truck, and all the furnishing. What I am worried about is her leaving our child at a friends house all the time so she doesn’t see the two of them having sex or sleeping together. Even worse I don't want the light of my life seeing mom sleeping with "uncle Johnny". I'm not very comfortable with him around her. With my now ex and myself always around when he way there it wasn't too bad but now he is going to be the new live in dad. I need to know what I can do to put a stop to this and fast before I move out of the house. If she wants to be with a alcoholic/drug using, cheating, wife beating con that is her bad decision. That shouldn't be a decision that is forced on to my little girl. Please any help is much needed.