PLEASE EMOTIONAL SUPPORT

I just found out my SO is being sworn into the navy November 3rd (WAY sooner than expected) I want to be as supportive as possible because he is nervous. But I am FREAKING OUT I'm not used to not having any control over the situation (personal problem I know) but I am just going to miss him so much that thinking about it breaks my heart. I trust him and love him so much so I'm not scared of cheating or anything. But I'm going to miss the little stuff like date nights, surprise visits, and driving down to see him whenever. Any military gf/wives have ANY advice or would like give their personal story? It would be very much appreciated. ?