Manipulated??

Enrique has a reputation for hurting girls, he is a senior and I am just a freshman. This year he turned his attention on me, stuff started to happen with us. We could never be in a relationship because of all the drama that would ensue. But I'm 90% sure he has other things going on with girls. He also has a reputation for being able to manipulate girls to do anything for and with him. I try to watch out for when he is bsing me, but sometime when we are together in person, I just fall for him. I hate his ability to make me want him so badly, and I control myself but it is soo hard. Especially when he is all over me emotionally and physically. I want to believe everything he says, but I know girls that have and they have been hurt so badly. He is really smart, in the top ten ppl of his cl, but he also is into a lot of bad things.. drugs, etc. I hate that I love him.. I just don't know how to get out of his web, it's addictive. What should I do?