Showed you his BUTT? For Gawds sake, what is wrong with people or was that a typo? Either way---This behaviour is so insane---the "oh you're back? let me now DUMP on you for a while" is just a classic sign of narcissim (to me) It IS winning. it IS him wanting to know he has the POWER, but then he wants no responsibility or accountablitly. How incredibly awful. I am so sorry. I have been there.
I thought also, that I would never get over him, the breakup, the real one was SO painful. FOR MONTHS. Maybe I felt like i LOST, because honestly HE was not worth keeping and I do not understand why I tried so so hard to "be good" for so so long. What a waste. I hope you have a wonderful Thanksgiving without him.