So Hopelessly In Love

I'm a sophomore in college and my RA is a junior. We have a lot in common, same major, similar family life, we even both identify as queer (primarily attracted to the same gender, but open to being in a heterosexual relationship). I have the biggest crush on him, he's literally everything I could ever hope for in a guy- kind, thoughtful, funny, passionate about his career. It's getting to the point where I could literally picture having a future with him. 
But because he's an RA, he technically isn't even allowed to be "friends" with us as his residents. I'm moving off the floor next year and I have no way of knowing if we'll keep talking or hang out, and I'm so scared that I'll never get the chance to tell him how I feel. I also worry that the somewhat flirty actions he has around me are just part of his personality.
 We're taking a class together this semester and he always sits really close to me and makes a lot of physical contact. We've both really opened up to each other about pretty personal things this year, so he's become someone that I deeply trust. I don't want to do anything to ruin the awesome friendship we have, but I also feel like we would be amazing together as a couple. I wish I knew how to tell him how I really feel. 
Advice?