Miserable

I am 19 weeks pregnant with mine and my boyfriend's only. We have an apartment together, two animals, but I'm the one who pays the bills. We used to bartend together, but I went and used my degree and started working at a fertility clinic. I found out I was pregnant and he felt like he lost his party buddy. I have begged, pleaded, cried all night every night to him about him paying rent on time, helping me save for our child, to stop having us get eviction notices, to just be here to support me in any way. I love him, I give him the benefit of the doubt every single time he doesn't come Home because he's out partying all night. I give him chances every time he messes up by not paying rent on time. But I'm tired. I'm depressed. I'm so sad that he has turned this experience into the most miserable time of my life. How do I make him care for me and his child? How do I make him realize we should be important. That the party isn't over, the party is just different now. I want to look forward to having my child, not look at the future so unsure if he's gonna be there and how I'm gonna be able to do it alone. I'm so lost, I don't even feel like myself anymore.