Days counting down to lonely

Lately I've realized how much the people in my life mean to me.
You really start to appreciate things when you only have a limited amount of time.
Im seeing all of my friends moving on. Missions, College, Work.. some even getting married and having families.. Its the coolest thing to see where everyone's lives are taking them..
But I cant help but be a little scared now knowing that everything is going to change.
After change occurs we always learn how to either make the best of it or we see that it truly was in our best interest. But before the storm.. Its a pretty empty feeling.
The worse part is when you leave things up in the air.
I always wish that ppl were able to say exactly how they feel and were able to express it in the fullest way possible.. Often times when I actually get up the nerve to say how I feel I cant say the words that I needed most to say and then that moment has passed me by.
I meet new ppl everyday at work and at school but for some reason I always compare everyone I meet to one particular boy. You know, they say 80% of ppl marry someone they met before the age of 18.. I completely believe it and mostly because the relationships you form in middle school and high school are some of the rawest relationships you will ever have.
Your learning how to communicate and treat others and your both growing and in a sense your growing together. You also make the most idiotic mistakes in your teenage years and I think learning to forgive the little mistakes help you grow.
Its funny how you form a strangely close connection to those that you grow up with.
Sometimes it make me mad because I feel like im constantly comparing others to ppl that I've known and loved for over 6 years.
and the worst part is that all of these boys that I've come to know and love have left or are leaving for 2 years.
Now if they didn't serve their missions that i wouldn't respect them as much.
But the fact that their all leaving is defiantly bitter-sweet.
Im scared of leaving loose ends.. Im scared of the effect 2 years has on a person..
And im mostly scared that things will never be the same..