Guys, Explain his behaviour?

We didn't see each other for a month, he invited me to come to the country he currently work in...
But said, he is very busy, but still want to see me...
So i came, at 1st day everything was fine. Then yesterday he came late from work, he seemef to be in a good mood, joked, laughed with me... then we watched a novie and he said, lets just sleep.
So we went to bed, he just cuddled me and felt asleep, no sex...
Can u explain his behaviour?
He jusy tired from work or he has no interest in me?
He changed a lot for past several months... Seldom calls, no attention and we see each other extremely rare.
What do u think?
Guys, Explain his behaviour?
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