Should I get child support from him?

My husband and I are separated physically. It was a mutual decision to rent an apartment . If we divorced , I would have the house , two cars and furniture basically just take your clothes and personal belongings . Also pay for her two student loans ($ 600) , both of which I am a co-signer . MedlinePlus I did not ask money for the kids , because after the loan payments and rent it basically has no money . I am a professional in the medical field and when we're together I paid most of the bills , provided insurance for our 2 children , 2 and 6 , who supported the family . I do a little more than 100,000 per year . He is a taxi driver now and probably makes 20,000 or less per year ... probably much less . Should I stop paying student loans and not bother with child support ? He has children three days a week in the mornings to work , and work at night. The children live with me .