I think I am losing my best friend.
How do you feel about losing your best friend?
I'm feel afraid of losing my best friend, we are drifting away
It is very understandable in liking you best friend very much and fear of losing them, but friendships do not last forever. You cannot expect your friend to be your friend forever, life goes on.
But in what way are we going to change? I don't know how my life will go on if I lose my best friend.
Lots of things happen, like new jobs, school, and marriage. It may be worth trying to keep your hardest to stay in touch, but sometimes that isn't enough. Why don't you find new friends, so you don't get too lonely?