He's probably not being more blatant about sex because he doesn't want to push you away. Besides, he realizes you know he wants sex, so he figures you'll let him know if you change your mind.
If he's not going for a relationship, then he likely doesn't want to be tied down or committed to anyone. You can puzzle over why he continues to flirt with you and date you if nothing is happening, but somebody could ask the same question of you. Why are you spending so much time with a guy who won't offer you a relationship? Maybe he's content with what you guys have and isn't interested in anything more serious at this point of his life. That is assuming he's the one who's said he doesn't want it to progress toward a relationship. If you're the one who's turned him down on that, then he probably really likes you and is just taking whatever he can get.
Last edited by VerticalMoon; 12-06-13 at 06:40 AM.
“This planet has - or rather had - a problem, which was this: most of the people living on it were unhappy for pretty much of the time. Many solutions were suggested for this problem, but most of these were largely concerned with the movement of small green pieces of paper, which was odd because on the whole it wasn't the small green pieces of paper that were unhappy.” ― Douglas Adams, The Hitchhiker's Guide to the Galaxy