Need some advice on my ex!

Okay so I recently broke up with my bf and he’s still gonna be living with me for the next 2 months till he finds a place. I bought a sxs that I WANTED and have been paying for and he co signed just so he could drive it. I still have the loan on that and it’s at $20k left. He (even tho I mean me) also has a boat that I took out a loan for and have been paying for, the loan total was $8k…he hasn’t paid me a dime even though I bring it up constantly. He said he wanted to keep the sxs and then I sell the boat and I was okay, I’ll gladly take the smaller loan. Well I brought it up yesterday and he said that I have to make 2 more payments on the sxs, pay him for the speakers he put in it and now he’s selling the boat and told me I wouldn’t get all the money from it. What do I do I feel like I’m at a loss! Like I feel like he’s trying to screw me over cause that’s his thing.