Advice?

Ok so me and my boyfriend/best friend have been together for almost a year...we've gone through a lot together...even just in this short time. We've even stayed together when my parents have (and still are) trying desperately to get us to break up. My problem is that I'm getting ready to go to school, and will be gone except for the weekends. He's thinking about Army for a couple years, then come home and get a home started for us. We won't see eachother for a long time, and prob won't get to talk much either. I truly love him with all my heart, but I'm worried that something will happen and we'll never get to be together again. He says when he comes home it's still gonna be us and that he'll come find me whenever I'm at (bc I'm a horse person, I'll have to travel a distance for any good horse job). I'm just so scared of losing him. Any advice would be appreciated 😊