It's the angle of the paradigm
I feel kind of torn about the whole situation. Something deep down is telling me to stick around, wait it out, see what happens. But the rational part of my brain says that he's pretty much just like every other boy I've been involved with, the only difference is that I'm actually physically attracted to this one. I knew he only wanted something casual when we started seeing each other and I was willing to give it a shot, to see if maybe the casual thing would work for me. Try anything once, you know? But this isn't what I want at all. As good as he is at making me feel sexy as hell, I'm not totally sure he's boyfriend material or really knows what he's getting himself into with me. And I've come to the conclusion that I'm definitely looking for something potentially long-term; I can't stand flings. And that is exactly what this feels like.
I just don't want to lead him into thinking that I'm going to sleep with him when I probably won't as long as this stays "casual". Maybe it's better to end it now before his expectations get too high or I get too attached.