OMG!! What do I do???

I have been married for 4 years now. We have a 2 1/2 year old and 11 month old. We decided to do the 3 most stressful things all at once. Buy a house, have a child and start a new job(he did). Everything was ok for about 3 months but then he constantly complained about work being hard. After 6 months he was fired and that is when the trouble began. I had never been totally upset before about everything being in my name, but now I was taking out a loan to pay for all the late payments for the house and car and bills and it took him 2 months to find a new job. during this time his car broke down and without my knowledge, he bought a junk car.  Then all in one week he called me to say he was leaving me and taking the kids. After resolving that argument his junk car broke down(same day) and I had to use my credit to get him another car. 2 days later he was fired from his job and has been out of work ever since. We are once again behind on everything. He stays home with the kids and works once a week running a karaoke show for $70. He is not doing anything at home when I am gone. Now I have worked at the same job for 5 years and until recently we paid everything on time or close to it. Now I'm not sure what to do because I also have bi-polar disorder and have been on medication continuously and have only had a couple of issues with readjustment. I don't want to lose the kids. He is not able to put anything into his own name. He will not leave and I don't want to abandon my home either. I have tried financial advice but he has no desire to participate and same with counseling. Please help.