Relationship advice please?

I have known this guy named Heracles (funny name right?) for a long time and he is kind of an asshole but for as long as I can remember I have been slowly falling in love with everything about him. He never goes to work, so he is a bum that sleeps all day. He has a ton of cats so he is kind of crazy, he might be an animal hoarder. We fight all the time; all of our mutual friends avoid inviting us to the same parties and get-together to avoid a fight between the two of us. After all of this though, I find myself awake at night thinking about him and wishing he were with me. How do I tell him that I feel this way?