Girlfriend (18F) troubled about boyfriend (18M) joining Canadian armed forces. How can i cope with it?

My boyfriend (he’s 18M and i’m 18F, we have been dating for about 6 months) is going to boot camp in April. If he likes it, he wants to go full time 5 hours away from home. We’re both 18, we’re young, but we’re starting to figure out what our future will be career wise. Im scared were not going down the same path. Not only am i terrified about the long distance and having to live a life where my partner is nearly absent (I do not want that), im also scared of the person he’ll have become after bootcamp. Yes, it’s what he wants and i respect that because I love him so much, but just hearing about him going to boot camp feels like stabs to the heart every time. Also, im scared that he just doesn’t really care about me because he didn’t even include me in his hesitation on wether he should go or not at first, like he doesn’t care if i go through a lot of pain and if were apart. Yes it’s a good thing because he doesn’t change his wishes for anyone, but im thinking it could also say something about his feelings for me… is it normal to think that way? he really cared about me would he think about moving 5 hours away? (Theres a base nearby…) (maybe im just paranoid) How can i cope with it?