mom in law hates me-sleeping in car alone-need opinions

Alright ladies been with this man the love of my life for over a year now. I need opinions. Big time. He has a drinking problem. I was almost out the door a couple months ago. He assured me he would stop drinking. 2 1/2 months went by with him being sober. I had just gotten a job stupid me said while wanting to celebrate he could have a beer. It went from there. One night he wanted to show me he could truly drink again. I said whatever why not. Shit gets said for no reason, he threatens to leave me in a parking lot downtown while cold af....mind he's drunk....anyways proved he couldn't handle it. But...he kept drinking. I got fed up on Friday and left 5 mins before he got home from work (he has a son (8yrs) I didn't want to leave his son home alone more than 5 mins) wishing the last couple days he calling felreaking out promising same stuff and more appears sincere....I talked it out with him...and I want to try to work it out. Mom in law to be hates me now. She won't let me step a foot inside(where we were living) He got a rental while I was gone...so now that we are trying to work it out I can't live with him anymore. So I'm stuck in the rental in the driveway loving him dearly don't get me wrong...(I would have had somewhere -a bed- to sleep on elsewhere tonight if I needed but I chose to be near him) but he isn't in the car with me(he needs to sleep cuz he's got work tomorrow) my best friend thinks that fucked up and yet another reason I'm being stupid trying to make it work. What do u ladies think??? Cuz I have no idea if I'm being okay about this or being stupid because I love him that I don't care....I'm confused...opinions please????