not that difficult
I beg to differ...for some, yes it is easy but others find this fear of rejection to be a massive obstacle to overcome. Speaking from personal experience I find anything like this so difficult and I really do understand you're situation liiii. It took me ages and ages to pluck up the courage to talk to the girl I liked and even though it didn't work out, the sense of accomplishment I felt from actually facing my fears outweighed the disappointment of not being with her.
I think he really is shy, he is not very extravert...
This may be positive news for you, he may well like you very much but is just uncertain of the whole situation. He possibly does get the hint that you like him but is maybe doubting his own judgements and has this fear of rejection also. Taking it slow could be better, certainly I would be put off by a girl being a bit too forward and always taking the initiative (the chance would be a fine thing! :). I can't speak for him, but as probably the shyest and most introverted man on the planet I feel I can speak from a position of some authority!
The fact that you like this guy is actually positive news for me as I always thought that girls only went for bold and extravert men. This gives me new hope, thanks.