Hi, I think Kastro is pretty much right on, except that he may be just as new to this as you, and he doesn't know what he's doing, and feels awkward, etc.
Hey, this was a KISS, right, not an extended make out session ? - so, I don't think that necessarily makes him wrong - and more power to you for the experience !
How else are you gonna learn what feels good and what doesn't ?
Who knows what he was doing - he probably doesn't know himself - Maybe he was hoping to feel some sparks, and didn't or maybe he thought he would try to push for something more, and then decided he didn't want to
In any case, please know that there may be plenty of guys interested in you - either ask them out, or get busy flirting - if it helps, you can imagine that he would be jealous
Guys will portray themselves as angels to get in a girls pants..
Since I am a guy this is what I can tell you..
1) Wanted some action
2) Had a change of mind
3) Saw something about you that turned him off
4) Used you for something
5) Liked you and is too nervous to admit it
I suggest finding a different guy, if you didn't like him from the beginning and still kissed him then that makes you no better then he was