Confused 😐 should i leave him?

I've been with my bf for almost 3 years now we have a baby together recently we've been fighting a lot I really want to get married but seems like that's not in his plans and now i don't think it's a good idea..we have a 9 month old baby and he doesn't help me at all with him (never changed his diaper never fed him etc)i feel like he doesn't love the baby:/ I barely even see him since he works so much and also he's a momma's boy he talks to his mom more than me and on his only day off he spends it with his mom and his other 3 children from previous marriage I'm really confused I don't know what to do 😔