Is he busy, uninterested, shy or just want to be friends?

There is a guy whom i know for many years. He's 8 yrs older than me and now pursuing medicine in America while im still in Asia. Despite distance apart, we keep in touch very frequently.

He once asked me whether im interested in any specific guy. I said no. He said he doesn't have a girl in mind either...but he plans to wait till he complete his medical sch education. After asking this question, i realised that he is not as chatty with me as before.

He calls me once in a while despite not having specific reason for calling. On the other hand, i realised that he gives "hugs", superlatives, "flowers" via facebook to a girl. He give some other girls that too, but not to me though i asked him for it once. I'm his No.3 in his top friend list in facebook tho..

Recently he kinda refuse to talk to me during weekdays because he claims to be busy. Whenever i come online on msn, he will appear offline. And whenever i go offline, he will soon appear online. He looks for me during weekends tho.

Is he busy, uninterested, shy or just want to be friends?
i think hes shy and just wants to be friends...cus hes not approaching u romantically...it kinda seems likeu like him though...and sometimes when u have nothing to say to someone and it gets awkward u kinda dont want to talk to them online...so yea..