Bf coming back from basic training


Hi gals! My bf’s in the airforce, he’s doing his basic training atm, left in May and comes back in July. Has anyone’s spouses come back completely different; personality, emotion, sense of humour etc wise?? I know they’ll change but to a certain extent of coarse. Cos I’m just scared when my bf comes back everything will be/feel different between us and even if he reconsiders me as a whole :/ we text everyday & the occasional phone call & some things are the same but a bit of him is slightly different & I’m not sure if it’s bc of the guys he’s been hanging around with or what. This is the first time I’ve been in a military spouse relationship so I have no idea what to expect. Pls help 😩