Thanks for the answer! Is this how hookup works? I would say don't assume anything you don't know. You never know someones situation, if there going through hard or busy times, or if they are simply not focused on that situation. Lets say he is single, then all you can do is simply ask to hang out with him again. Like I said, communication is key, you could ask him literally the same question you just asked me and he would answer it like a normal man and maybe even tell you the exact reason he never called you back. Which would be awesome if you got sex and the answer you've been looking for right?
Meeting and hanging out with someone new and exciting is always fun. And until and unless the two of you are mature enough to sit down and talk these issues out, they will eventually come and bit you in the ass. All of his compliments are superficial. They almost always center on how you look. I mean yes, complimenting you on your looks or appearance every once in a while is quite normal. Remember - if he really likes you, he will like everything about you, both inside and out. So keep an eye out for such signs you're just a hookup.
In the second to last episode of season six of Bones, "The Pain in the Heart", Brennan spends the night at Booth's because he feels he is protecting her from Broadsky, the season's villain. It is never actually confirmed, but widely assumed that they slept together that night and that is when she ended up pregnant. Either way, in between that episode and the next, "The Change in the Game", Brennan does become pregnant and tells Booth about it. Again, their relationship is never actually confirmed by the end of the sixth season. In the seventh season however, Booth and Brennan are definitely together. They are living together and the status of their relationship is known to all.