Thanks a lot for the responses.....
That was the story from his point of view, sorry! but had to know if any guys would think that this is reason enough to not pursue someone any more. I am the girl here and it goes like his: (sorry again)
I was flirting with this guy for some time. He would leave me home and such (we are living in the same street so he can see if I am at home or not when he returns home) and we have been once to dinner. He did not invite me on Valentine's day. I went sleeping very early Saturday and Sunday so it must have appeared I am not at home. I wasn't going to that place Sundays for some time now but he does not know, as he was not coming on Sundays for a while too (I know from a friend that he came). Met his friend 2 days later and asked him where he is. He suddenly started not showing up.
Does he think I am dating someone else?
He withdraws like that whenever I look a bit less interested (am never doing it intentionally but am pretty sensitive too). I don't want to call him as he has not invited me on Valentine's and is not showing up for over a week now.