Hey guys, I need some advice

My cousin and I have been super close all our lives but recently i moved away and she’s been going down a really bad path. I’ve tried to get her help and reason with her and it’s exhausting. I’m not giving up on her but i feel bad when I ignore her calls and she always gets upset whenever I dont. She never asks about my or my feelings and I’m honestly just tired. I don’t want to hurt her feelings and make her more depressed since it seems like I’m the main one she vents to but I feel weighed down.

What do i do?