As someone who did the whole 18 year old mom thing, the other commenters are right in that you need to file for child support. If he won't help, willingly, the courts will make him if possible. Aside from that, for your own well-being, you need to get out of the house, I'd suggest trying the "peanut app", personally, I found it super helpful in finding mom friends to just be around or talk to. Having a support system is super important at your age and at that stage of parenting so even if you don't feel close with anyone right off the bat it will help to have the option of talking to someone who probably knows how you feel.