You haven't said if he is verbally or physically abusive. If he is, you can apply for legal aid. The definition of abusive is a lot broader than you might think. In some states, it's illegal to yell in front of the kids at all. But keep in mind, that calling names can go both ways and if it's been mutual, he can also acuse you of being abusive.
If he has been screaming at you or slapping you or threatning you money wise, you can file for a court order of protection. That's the fastest way to get some child support going and to get the legal aid you could need.
If this is just marital bickering and you are getting kind of bored in the relationship, then you really should get a job first. Unless your husband is rather well off, I doubt that his child support would be enough to support you all.
You can not make him leave without a court order. I would also not suggest to lie in order to get one because that could come back to bite you in the arse.
I hope the 2 of you can work this out. It's a long, sad road no matter how civil you might try and make it.