REALLY need advice!

Ch

Me and my boyfriend are younger parents, I'm 19 and he is 23. We don't live together. I breastfeed my son and he won't take a bottle. His keeps pressuring me to get a full time job so we can get a place. But then he goes back to saying no stay home and breastfeed I'll pay for everything. I have a hard time wanting to work because I don't trust him to watch when he's done working because he's "too tired" to come see us or let us come over. How would I trust him to watch our baby? He NEVER comes over during the week because he is "tired" he spends his weekends here from 11-5 and idk what he does with his other time. He just says he's tired and goes. Idk how he doesn't come spend time with our baby boy because why would you want to miss out? I really don't get him. I honestly don't know what to think. He gets paid on fridays and runs out of money by Monday.. idk how because he only spends 2-300 on bills. We could have a house with the extra money but it's gone by Monday and he's broke. I am sick of practically being a single mom I don't know what to do anymore because obviously he doesn't want a place or to be around us often. I don't know what to do and would like to hear what you guys have to say. He's already a weekend dad do I leave him? Do I get child support because he already doesn't help much? I just need advice..