Is he not into me anymore?

I have some doubts regarding a guy that I met only recently and cant talk to friends about it.

We live in 2 different countries but I visit his city often for work purposes.
Im 27 he is 22, so he is younger than me.
My life is sorted out and laid back, and he has busy time at uni these days.
We met last year while I was in his hometown, and we became friends. One month after meeting we were chatting intensively but then I got busy and stopped replying, eventually we stopped talking and we kind of forgot about each other. I was definitely not interested into him, I though Id never meet him again plus he was younger.
After about a year, I visit his hometown again. Right after I arrived to hotel he contacted me again via facebook. First I thought he must had seen me somewhere in metro or someone told him I came, but no, that was really out of blue.
While I was there we met 4 times. Every day he worked until late and then took time to see me. The relation escalated from a great first friendly meeting 1st night, to some flirting on 2nd, by 3rd night we were all over each other, and 4th was a beautiful goodbye night.
I was going to visit again in 1 month so we stayed in touch, chatting more or less every day.
So now I came again to his hometown. We met on my 2nd night, and the meeting went a little awkward. I was really tired, and he said I dont look happy seeing him again. I said I was tired but Im very very happy. He asked jokingly, if I got him a present because we talked about getting presents to each other, and I said I DID. And I really did, something nice small and symbolic. He didnt get me anything and he felt kinda uncomfortable and said he felt shame. I said it doesnt matter at all... ... Then he gave me lil something from his wallet that means a lot to him. I was really happy. For the rest of the night we talked, and walked and I had to go back to hotel. We said we will meet again when we have time and that he would let me know via text.
The only interaction since then:
Him: goodmorning
Me: Hey whats up
But since then... radio silence... 3 days now.
He is regularly active on fb, so he is not dead.
I dont write, he doesnt write.
I will leave in 5 days.
Im thinking, is he not into me anymore? How do I know? If he is busy he would still text me, right? I can assume anything cause Im clearly into him, I like him a lot, which is why im a little afraid to put myself out there completely. Or do I just let the whole thing die out?
Its raining outside, the weather is **, Im at hotel alone and a little sad... shall I call him? I would prefer if he would call me first, show me he cares... I dont know what to think so Im writing a confession post here...
Gosh I feel like Im in highschool, afraid to talk, to text...but its only so because I care. Ohh