I'm getting frustrated recently got a car but my fiance can't drive it off the lot because we need…

I'm getting frustrated recently got a car but my fiance can't drive it off the lot because we need to pay taxes titles and license which is about 400. and not only that. but he works for this person. to put money on the car so we pay 200 a month plus what ever he makes a day. goes to the car. I'm frustrated because I'm 5 months and everything we got for baby was bought by me. nowhere told my fiance to work for someone else because the car isn't the only thing we have to worry about I feel like he doesn't want to help I get it he's on ssi and he can't work a lot but God damn help me get baby stuff I get do it all by myself shit I'm at my end of patience