I want some closure

This guy and I never really officially were a thing but we got really close this summer and become friends he told me he had feelings for me and we talked everyday then all of a sudden it became less and less until he never replied that was almost three weeks ago we were suppose to have plans and hang out this fall but he just disappeared and it hurts becuase I think we were going to be exclusive... he lives 3 hrs away and started college again I haven't tried to get a hold of him....he still likes all my pictures on fb he didn't use to that before we got close... I dream about him he made me so happy I just want to ask him how's he doing and ask him why we stopped talking I just need some closure I can't stop thinking about him should I text him and ask him what's up?