Chances? Blimey, my ex had more than his fair share. And he still asks for more 6 months after I called it a day! I know now that he wasn't looking for chances, he was looking to wipe the slate clean so that he could go and do it all over again. When I left it was for good, although there was a teeny part of me that might have re-considered if he had started to walk the walk. But he didn't and still isn't.
I don't want to waste anymore time in this stressful relationship.
And why should you? He is alone and has nothing because of his own actions. Do you really think that you should pay the price for his choices?
Please don't settle and do yourself a favour and get to meetings or counselling to address why you are thinking this way. You can have a fantastic life if you decide to.
And don't think of it as "giving up", think of it as grabbing hold of YOUR life.