Dude. Kick him to the curb. Srsly. He's creepy, and as others have pointed out, the fact that he says he won't rape you right off the top, means it's something he's really, really thought about. DON'T GO THERE!
I'm not so worried about him turning you into spacefille
soup, I'm more concerned with him raping you and then keeping you from reporting it through either shame or intimidation. You need to get rid of this guy. STAT!
Also, you're a better person than me. Instead of hiding it, I'd be more:
I'm not really sure what part of "no" you don't get. I'm not going to have sex with you. There isn't enough money or booze in the world. Most of the time, I don't even like you. And you're right that we're not getting any younger, so you might want to get over this heartbreak as soon as possible. If you don't, I'm calling outside parties to intervene, as this is harassment.