Keeps hurting me

I have been with a man for nearly ten years. He has repeatedly cheated and we have an 8 year old son. I pay for everything. I know people will think I m weak and stupid. I am. I have a good job but he destabilzes my life. I know we must split and feel its the end. Every time I catch him he says he does it to get out of the relationship. I don t know if does this to justify his cheating. I am sitting here crying again. Kicked him out last Fri as emailing a woman. I exposed him to her which made him mad. He s now saying again he wants to be on his own. I told his family as well as I ve had enough. He wants to talk face to face tomorrow. Not sure if that's a good thing. I ended it recnelty with him and he chased and chased me. He flips from one thing to another. I am so sad with my life. I know its silly but the thought of him with someone else long term makes me so sad.