Expect the unexpected

Last night I found out that someone I really care about is enlisting in the navy. Don't get me wong...I admire those who protect our country but it pulled the rug from under me so to speak. How do you deal with those who go off into the army, navy, coast guard? You want to support them but at the same time say don't leave. There are also all the things left unsaid. Do you say them or wait until the next time you see them hoping you are given the chance? I want to be supportive and to embrace this decision I just am not sure how to act right now. I'm about to lose someone who is close to me...how do you let them go? I think right now I'm more in a state of unbelief than anything. I am so proud of this person. Total shocker right now