boyfriend and god daughter

so i’m having an issue. my boyfriends girl “bestfriend” gave birth to a little girl in february. right away, she made my boyfriend and one of her other guy friends the god father. he would go see her a few times a month, so it was no big deal, and i was happy he got to see her.

fast forward to now, and the mom of my boyfriends god daughter went out of town for a week, and left the baby girl with one of her friends, who then asked my boyfriend to help her watch the baby,(kinda confusing i know) anyways stuff went down, and the babymamas mom, decided that she was gonna try to get custody of the little girl, because the babys mom was getting into really bad drugs(and is pregnant)

to spare you the details, my boyfriend stayed where the baby was, the whole time the mom was gone(about a week and a half) and not spending time with me, which is understandable but still annoying, neither of us have a car so i wasn’t TOO upset

so the other day, since the mom got her baby back, my boyfriend came home, and then came over to see me. at first we were just hanging out and, doing the stuff we normally do when we hangout, then we went to my bedroom to watch netflix, and just talked. this conversation had gotten brought up, and i knew it mad him upset and in a bad mood when we talked about it, so i was on my toes, making sure i didn’t say anything to make him super upset. i let him rant, and in conclusion, he said he was tired of all the drama that he has in his life, and so i tried to help him by telling him that maybe he should stop going over there for a while, and talking to everyone involved, so he had time to get his mental health back up.

he then started to say that his god daughter was the most important thing to him, and didn’t want that beautiful baby girl growing up in a fucked up home(which is understandable)

now here’s the issue. he’s putting this baby that’s not even his, over his own life. he’s super depressed, is living with his parents still, and is trying to find a decently paying job that’s not fast food, so he can afford to move out.(just turned 18)

sorry this got so long, but i guess i’m asking what i should do? how do i make him realize that there’s not much he can do to help until someone who has more power(like the babymamas mom) tries to step in, or at least make him put his own life and mental health over this baby, as there’s nothing he can do?