i'm interested in a boy, he is my old friend, known him for 7 years, we did not see each other for last 6 years, we met again a month ago, i'm interested in him, even i dreamt about him last night, he now went back to aust, i'm in hong kong, he met several times when he was in hk, he rarely says hi on msn after he went back to aus, does he have no interest in me? he was enthuisatics to seeing me for the first couple of times, then he stopped texting me frequently, he didnt call me out neither, a day when there was an issue at work, i called him in a morning when i was crying, he then talked to me for a bit and called me out for dinner the next day, then he didnt call up again till the last 20 mins before he got on board to the flight back to aust, however, i missed the calls, when i called back he has gone, i put sorry msgs in facebook and msn, he didnt reply, he didnt say hi to me after he went back to aust and he only replied me once another day when i have said hi to him. should i stop saying hi to him? or is he too busy? or he isnt intested in me?