I havent talked to him for a while?

so i havent talked to my boyfriend since tuesday because he went to Yosemite and he'll be there until sunday. the weird thing was that we were texting tuesday night he and he said he had to go to sleep and that was the last thing he said, he usually says i love you or goodnite, but that nite he didnt say anything and i havent had any contact with him since than. now i kinda feel like he doesnt want to talk to me or something. What do you think is going on? Thank you