I had a close friend and we drifted apart. Every time I'd plan something she'd always bail at last min. She never called to make plans with me.
So I just ignored her.
I saw her 10 years later in a store. Turned out she had been on drugs. Her husband was dieing but on drugs too. Even her kids.
So I'm glad things went down the way they did.

Point is. You never know what's going on in someone else's head or life. Let her go.