Most Helpful Guy
Right off the bat, I got this feeling that you're looking for a particular answer to justify what it is that you've already decided you want to do. That in mind, I know that the greater chance is these replies aren't what is going to help you make up your mind. So how about this: what is it about this guy that even makes you want to be with him, much less give him something that you can never get back? Is there even a valid reason; something truthful that would satisfy a close friend or parent if they asked? At the end of the day, you're the only one who can make this decision.
Just remember, when people say that you only regret the things you don't do, they're lying, even if they don't know it yet. There is satisfaction in being able to think back to when you were smart enough to save yourself from making a big mistake. And this smells like it could very easily turn into a VERY big mistake. So make your future self proud. Give your future children all the more reason to look up to you, and your future husband all the luckier to have you.
It's going to be tough, but you even asking this here tells me enough to know that you can make smart decisions. So go make yourself proud :)
Most Helpful Girl
He wants to have sex with you. Thats it. I dont think he loves you if he's been with 15 girls before he's just trying to claim as many as possible. If you go its likely you'll have sex and he could have stds. If you do go please bring protection. But dont go. he's using you.