How should i handle this sticky situation?

Hi, this 25 y/o guy I went on 4 dates with is asking me out to be his gf just to have with him. I didn't though. He went as far as claiming he is a virgin and asks me to crash over. He lied n played with my emotions at first and said he likes me. I found out his female friend (i know her) told him how i treated her cousin bad when we went out in HS, so she wants him to play me and she tried to convince me he is a good guy and not a player. They are plotting a subliminal payback. This sounds crazy but i am shocked too. Now, he is so desperate since he put in effort already, he says he is falling in love with me and he thinks i am buying it. Him and the grl think i'm so dumb i'm falling for his crap. How can i make him feel like crap? If he calls, should i ignore his calls or pick up & tell him "sry, i'm not interested in u" or confront "i know ur trying to get into my pants" but he will only deny? Or should i tell him he is a CREEP?