maturity and responsibility

Does anyone else feel like being single because it makes you mature up or go through with your responsibilities? I've been with this guy for a year and a half and we have a baby together. He makes hella money sometimes and other times doesn't make shit (he's a federal grain inspector) well, he smokes green and even if we have a bill to pay and he gets a 130$ paycheck cause it's the shitty season, he still tells me- I'm gonna get only $20 of green....like you don't have $20 to spend??? Our bill is a loan payment of 125$ and he got a 130$ paycheck today....it's due today and so his response? He's getting the money from his mom. He's 23 and still does that shit. I asked my mom for gas money or to buy diapers and stuff for my baby since I didn't have a job and our money he brought home was being wasted. I never asked her for money just so I can blow it. I'm just disappointed in him, like really disappointed. We had $500 to pay in rent, $111 for electric, which were both due last week and he made shit for a paycheck so we didn't pay either one. Then there's a bill of 501$ for cable that he never once paid so I cancelled it and now we stil have to pay it off...I just want to be alone so I can get my shit together but he doesn't because he doesn't want to be alone...I'm so depressed and angry because of how childish he's being. Like grow up.