What are the reasons a guy would want a secret relationship?

There's this guy that I hooked up with before but now I don't want that and he won't leave me alone. He keeps trying to get with me. I kind of liked him before, but i'm trying to let him go now but it's hard when he keep tryin to talk to me again. When he was texing me he told me he wants to be with me, and people can see us together but he doesnt want everyone to know that we're together. He said he doesnt feel comfortable with a relationship out in the open because drama and fights always got started. He even told me he had feelings and loved me. Why is he doing all this, is it all a lie to hook up with me again?