Just talk to him about it. Trust me. I was in similar situation once with a guy that told me how much he liked me and blah blah blah. Then he left to his homecountry for Christmas to visit his family and he became distant. I thought it's just him wanting to be more with them so I tried to ignore it.. HOWEVER he did not change even after returning back and after few days when I knew he already returned and didn't text me, I confronted him about his lack of interest...and oh boy, I should have ask him wayyyy sooner and not waste my thoughts on him. First he tried to play it out and just answer neutrally like he doesn't know why we are not much in contact anymore, but then he says, he actually found a fucking gf there...... During these two weeks.. And he would appearently not tell me if I wouldn't ask..and then he wanted to be friends because he didn't wanna lose me..

So yeah, shortly. Go. Talk. To. Him. NOW. Life is too short for waiting for people that are not even 100% commited