Do you think he likes me? Pls help!!?

basically, when he would come up to me and say hi.. he only ask me 'how are u'.... n would give me one word answer! .. he would look surprise when i ask him .. why to a question! and then take his time and then reply! .. his voice would turn really low, and quiet! i cant hear him.. i sometime dont even remember wot he says! .. He would send me sms.. and add 'xxxxxx' at the end of the msg! ... and on fb! dont think its his trademark! .. he never ask me about me!! only 'how are you' .. he would smile while talking to me.. but.. i dont know.. wot do u think? pls help guys!