Calling all girls...I need boy advice!!!!?

So I have a guy roommate that im living with for the summer. We are working the same internship in South Carolina, and we go to the same college in Ohio. I seriously have feelings for him. I like him soooo much and I really want to tell him and see how he feels. But idk if he does know or not. Im not his type physically but we have sooo much in common it is crazy and we get along sooo good. We are really good friends now. I dont know if I should tell him, im just afraid of his response and if hes not interested in me, im afraid things are going to be awkward the rest of the summer and I dont want to ruin what we have now. So I really need some advice of what to do!!! Thanks guys :) ?????