I am going through a seperation in NY and I am lost rite now. I have some questions Please help?

We have been married 5 years and have a 2yo and a 5yo ( 2 kids ) My husband works and paid the bills (he's a cop)( he makes about 60 thousand a year). I have not worked in 2 years I have been home with the baby.I have a nursing degree but as a new graduate I had a difficult time finding a job,it's been 2 years ..especially because my husband works nights on a rotating shift and refused to Switch to days. (there is no one to watch the kids) His mother ownes out house and pays the mortgage we just moved in 6 months ago........Well now he's been being emotionally absent ,emotionally abusive, disrespectful and just plain nasty to me I put up with it for 6 months but I just could not be his door mat anymore. He refused to communicate and does not love me anymore (he at least admitted that). I packed the kids and left because I was so unhappy with the disrespect. I am back in the house and he's staying at a friends ( I have no rights to the house) I have the kids and I got a job in a daycare center getting free childcare. I am not making much money at all maybe 1300 a month tops . He agreed to give me 1,000 a month for the kids. I am moving out of his moms house into an apartment. We are getting a separation I don't deserve this nor do my children. What am I entitled to financially from him ? Does he have to help out with my rent ? Am I entitled to alimony ? I am scared and I am lost ,my heart is broken and I just don't know how we are going to survive . I cannot stay in the house he is moving back in and me and the kids are moving out