Depression is something no one should have to go through so here's some suggestions for you
-ALWAYS keep her mind occupied, don't let her have nothing to think about or she will sink further
-NEVER let her say anything, even jokingly about suicide or depression. my best friend in the whole fucking world committed suicide last year. It's ruins lives
-ALWAYS remind her how lucky she is and that she's a great person and friend and you'd be lost without her
-NEVER snap at her for being depressed or anything. Yes it may be tiresome and annoying but she needs you.
Sorry I'm really busy or I'd write more.
Hope it helps.
If you want or need advice or need to rant please feel free to email me at I.carried.on@gmail.com
LOVE FROM AMANDA