I Fell In love With My best Friend

What would you do if you fell in love with your best friend? You don't want to ruin your friendship but you also can't help these feelings you've started to develope towards him. That's what's started to happen to me. I've known my best friend literally since we worn 5. I only started developing these feelings recently. I can't help it. He's sweet, funny, very caring and protective of me. I love him so much, but how do I tell him without the risk of rejection, humiliation, and possibly the loss of the most important person to me...my best friend.