The thing is that every woman believes that abusive men are always somewhere "out there" and that truly abusive men are always abusive. The truth is that there is a cycle to abuse. There is the abusive period, and then there is the make up period where everything is great. Its the cycle that gets many women hooked as they look at the good times and say "he is such a great guy". But, EVERY abusive man has a great side. (Well, most of them.) I wouldn't say that he has multiple personalities (I have PTSD and was hospitalized with DID patients, and the disorder doesn't manifest like that.) Nor would I point to bipolar, as that just stereotypes the bipolar disorder into something it isn't. I think he is just an abusive arse, plain and simple. No need to pin a disorder on him in order to explain his behavior away.

Get away from him now. He has destroyed your car. Are you going to stick around so that he destroys you, too?

ETA...

Do you realize you are deep in the throws of an abusive relationship? It is typical of the one being abused to look at themselves and think they are the ones doing wrong. I think your title points to this clearly.