leaving my baby daddy

Idk if it's just me or I'm crazy or hormonal still. 
I'm 5 months pp. 
I'm always home alone with my son , my baby daddy work from 4 am until 7 Pm
Idk sometimes I feel like I don't wanna be in a relationship sometimes I feel like I cnt live without him.
But most of the time I feel like I don't want to be in a relationship tho. 
To be honest one of the main reasons I don't leave is because I know I won't be able to be a stay at home mom if I moved I would have to work. And won't be able to see my son as much. But since I'm here he works and pays for all our stuff. 
I feel so bad sometimes we argue and we break up and I say I'm going to leave but I don't  than a few hours after I think to myself I should have left!
Does anyone else feel his way? Or going through similar situation?