If this doesn’t go to plan, you’re living situation will be in jeopardy. At least the comfort-ability of living there will be. I get nervous when people say they’ve falling in love with someone that they aren’t in a relationship with, much less with a person who you don’t even know likes you back. I would see how he feels for sure, but I would hope for the best and prepare for the worst. You dont want to go getting yourself hurt, or ruining the friendship you have. On the other hand, no one ever fell in love without risking getting hurt, so perhaps try some subtle flirting at first to gage his reaction. Subtle skin contact always works, eye contact, touching, complementing, noticing little things about the other person.. best of luck!