I've somewhat BTDT, things are slightly different here though.
Ex-h and I seperated in late 2002, but because of money, we still lived in the same house. By 2003 I met and started seeing SO (ex-h was fully aware, unhappy, but aware).
In October 2004, DD and I moved to be with SO. Now after we seperated, ex-h had started distancing himself from DD, but would still play with her here and there. I was still the #1 care-taker. As a matter of fact, he quit his job, so I was pretty much the only care-taker. The money he had in his account, if I had to feed DD, I had to 'borrow' it from him, and later pay him back.... That's a whole other story though..
So, DD and I move out in OCtober 2004, almost a year now, and ex-h decided that was it. He's done playing daddy, and has NO contact, period, with her at all. Not a card for her birthday, not a phone call, NOTHING. He wants to know how quickly he can terminate his parental rights. Oh, but he won't pay to get this started, he wants me to.....
In the last 11 months, he has contacted me ONCE, and DD zero times. He only contacted me after the county filed for child support (which I do not recieve), and wondering WHY he should have to pay anything... His reasoning was, that IIII was the one who left and 'took her away', so that means I don't deserve child support... *sighs*
So, I can kinda relate. BUt not totally, since my ex-h has nothing to do with us period, and doesn't even pretend he wants to try...
I'm sorry things are so rough, but am happy you have your SO in your life