Push you, pull you. Ahh, it takes me back.
The thing I found hardest to accept once someone shone a light on my relationship with my ex was that to stay in such a dysfunctional situation, I HAD to be getting something out of it. So.. what are you getting out of this? What keeps you coming back for more?
Remember, you can't control his behaviour, but you can control yourself, your behaviour, your choices.
So.. hop off the merry-go-round.
The best way to deal with this is stop what you are doing and do something completely different. Take a step back, a deep breath, let him go see his therapist and set off his road to change and meanwhile you start your stroll down yours.
It's Einstein's definition of insanity and 'nothing changes if nothing changes' writ large.