I just don’t like him.

I had been talking to this guy, but I’ve come to realize i don’t really like him. I thought I did, but as i got to know him more, I just can’t see myself being with him. He’s just not the type of person I take my interest in. However, he is head over heels with me. He’s always calling me baby and stuff and I don’t know how to tell him that I don’t like him like that. What do I do?