A Man With Pretty Lips

My younger brother whom left for a business trip, left his childhood friend in our house. "Because he is more reliable than anyone I know". That's what he said so I was forced to accepted it. I know you won't believe me when I said the "reliable" guy was the person who stole my first kiss! What should I do? Living with my younger brother's friend, kissed by his pretty lips, is now a fine looking man. Will I end up falling for him or stick to my "will never date someone younger than me" motto?