is it still "talking" or are we in a relationship?

So this guy and I have been talking since late September. Things are SO GOOD. We've been on a few dates and made out a couple of times. I love sex. So does he. But we haven't done anything? I want this to work bc he's seriously an awesome guy. How do I bring up the "are we in a relationship? Or do you just want to hookup" conversation without ruining anything???