My best 'boy' friend...what do I do?

So I'm thinking I like my bestfriend...but I don't want to go out with him...but then again I find myself thinking about him constantly. I know he likes me since he always says he loves me and a hand ful of compliments but I can't see myself with him so apart of me wants to be with him but then my image to others would be weird because he's not the most cutest guy in the world...soo what do I do!?