What do you do when a formerly psycho guy likes you?

Okay, there's this guy that was reeeally weird when we were younger, and everyone perdy much hated him. Well, a lot of people still think he's weird. But, he just asked me out (we've been hanging out some since it's been a while) a little bit ago and I'm not sure what to do. I mean, he's okay and all, and a good friend, but I don't even know if I like him that way...So, any tips? D: