Guys who toys with girls

Someone's been toying with me lately. This guy who keeps on saying he loved me when the truth is he don't. He is a bipolar sort of guy. He always tells me this sugarcoated words. And always hold me like he's my boyfriend. I don't know what to do. I thought he's the type of guy that I like. But when I get to know him, he's a lot worse than I think. I keep on being cool so he won't get under my skin. But if he don't stop what he's doing. I'm afraid I can't handle it.