Why would a soon-to-be ex-husband be so mad if he was the one who left?

[D]

I was abandoned by my husband a couple of months ago; he took the car and wiped the bank account. and left one day I wasn't working at the time because of going to nursing school full time. So after trying to get myself back on track (I found a part time job and healing from this pain), he is acting very hateful towards me. He was the one who left because he said he felt "pressured" because he couldn't do what he wanted. Here is what he wanted (after 11 yrs of marriage): he had a hidden facebook account with at least 30 girls he worked with (all 18-20yr olds), profiles on dating websites, phone calls and text messages to all the coworkers (girls), leaving whenever he wanted and not having to explain where and when he'd be back, not talking to me at all at home, no intimacy, no communication, no help around the house, blowing up his money because in his words "it is MY money", and even complaining I wasn't giving him attention because I "studied too much"! So these were his complaints therefore in his conception of "marriage" he could no longer "put up with me" anymore. Ok, what could I do... he left and I was alone, no family around, no kids, just a few friends. It was very hard at first, I cried a lot, but then I went thru all these healing phases, and now I'm at the acceptance and moving on phase. Not looking to be with anyone but happy to be by myself, content per say. He has been sending me the meanest texts whenever he needs to get some kind of information (bank, cell phone, etc). I've tried to put all my bills into my name so not to have any more contact with me, but it appears that he wants to continue to communicate with me, or come by to get his mail (he wants me to hand it to him, which I don't do. I leave in the mailbox). I've filed for divorce and he's about to get served next week. So, what does his attitude mean? Why the meaness now if he was the one who up and left? I'm not bothering him at all. I'm minding my own business. I still live in the house, though, and the mortgage is in his name. But he said he didnt want to live here anymore. So why is he so pissed at me now?
I just said the reason he left: he wanted his cake and eat it too. He wanted to pursue side-relationships and expect me to be ok with it. He kept saying, "i have no rights to have friends (female)", except that he had no friends whatsoever because he was just a cave man, wanting to stay home all the time. But he wanted to be online talking to other women, and I read all his messages and found out it was not just plain friendship. I read that he wanted to "get rid of me", telling them our marriage was a joke. Then when I confronted him, he denied everything and I guess couldn't keep his face anymore and left.
HiThere, wow that is a pretty pathetic guy, your ex! Yes, it does sound like mine, except I have no proof that he has cheated. He was chasing any young girl that crossed his path, like a dog in heat. He's 38 yrs old too, pretty old and immature. I doubt that mine would ever crawl back. But yes I agree with you that they do that out of guilt, perhaps.
I like what you wrote, Gary. It makes a lot of sense now.
Rose and SoftTouch, you guys have a lot of wisdom. The thing of it is, I cannot even treat him badly. I am in a moment of my life that I am really wanting to treat people with a lot of dignity. And everytime I talk to him, it is no different. I think it angers him more if I treat him with respect than if I just joined in his drama. And yes, he loves drama. If he asks me a question he must add a huge element of drama to it, instead of plain asking the question.