When my crush is tired he's......Help Help?

Well thanks for ur visiting

My crush has just come back from his country for holiday, and then he was online on msn, i said hi to him, and he said he's tired after the trip and he was sleeping...

And we still talked but he answered a bit slow, i thought he was just chatting and sleeping, he also sometimes replies me in his country's language, that's why i know he was still sleepy.

And then i said ...if u r tired, just have a rest, c ya...

And then he said ..c ya

I felt a bit disappointed

There r some signs that i think he would interested in me, but some dont show that he likes me, so i was too confuse

But now because of this convo i had with him, i felt like he doesnt like me

So is it a sign show that he's not interested in me too?

OR just because he was just so sleepy and tired?

He's 16 and i am 15, we came from different countries. He's japanese and he's Pisces( If u need that information too)

Thanks all^^