How to you restart a friendship with someone you were once intimate with?

We were a little more than friends with benefits. We became roommates in a studio and now things hit the ceiling. We talked and realize us being friends is better because he lacks effort. He’s putting more effort into a female friend (he swears he’s not messing with but I digress). We’re in a studio and we can’t necessarily separate due to funds and me being in school. We want the friendship but our space is kinda messing with us. I bought a bed and got an Airbnb for the weekend. Everything kinda feels weird
How to you restart a friendship with someone you were once intimate with?
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