something is off

So everything w my bf has always been great except we bicker a couple times a week. it’s over small things so it doesn’t really get to much. normally he leaves his phone in the room with me when he goes to the bathroom or showers but lately he’s been taking it with him. tonight he put his phone on the bed by my feet while he was changing and i was about to kick it off so i got it and put it on his side of the bed but then he took it back and a minute later got back into bed. he won’t let me play on it anymore either. he took me off find my friends. i asked him what he did last night and he said “i don’t remember” when i know he went to the frat house....

something is just very off and i don’t know what to do