I would say he probably had a few lined up too and was just deciding which to "choose" so to speak.Im so sorry for you HelenaM, unfortunately you do have to kiss a few frogs before you find your prince!
This sort of thing does annoy me though, i cant see why someone cant give you an explanation of sorts cause if your confidence is a bit low anyway, it makes you worse, wondering what on earth you did wrong, when in fact the answer is more than likely nothing!
Do nothing now, wait and see what happens, if he doesnt call after a day or so, i think you can write him off.sorry.
I wish you loads of luck.