Peace for the Unworthy

You know that someone, a friend, who you vibe with, the one who you have a connection with?
It's because you've spent a certain time together - be it a conscious effort or both of you just drifted to one another, more often than not.
Then one day, you realize your days run through with them around. You become aware when they're not and just know when even the smallest of things changes (or at least you thought so).

They're that someone you could rely on to be there in the trying times and would back you up when you're stuck.
Someone you just know would be there. Always.

... until suddenly they're not.