I think you're very attractive, too. You have such a pretty face.

(sorry, I couldn't resist saying that.)
So engage him as a business friend. You never know what could happen. My husband and I were buddies for a year before he announced he had a crush on me and I said I had a crush on him and the rest was history. Obviously I understand about the weight thing and how it makes you feel but once you've been friends for awhile you just become people and it becomes less important.
It's pretty neat though when you get that feeling again. Puts a little zip in your step, as my mother would say.