family is falling apart after my brother’s death

hi, i will try to make this as short as possible but there’s going to heavy topics such as

• self harm
• suicide
• etc

my brother took his life back in march, i have struggled with depressed for as long as i can remember and i was unaware of how much he had lost himself. i struggle with this thought every day, we were extremely close and he was my best friend

my parents are divorced and my mom is always so angry at my dad because we know he played a huge part in why my brother felt the way he did. he was never a great father but that is a completely different story

my little sister just turned 13 and now i am learning that she has begun cutting herself. i am completely overwhelmed. i don’t want my mom going through this by herself, i love her so much and i’m scared she’s more depressed than i will ever know. i keep flying back and forth across the country because my best friend and his family live in my dream state but i feel like i’m abandoning my family. i see it as a break, a much needed one, but now i feel like an asshole. i’m literally leaving from the 7th—17th of this month

what do i do about my sister? i’m scared she has been talking to people who are not her age. she spends all day playing games with people in her room and i’ve heard her say some pretty raunchy things. i was dismissive about it because i was a very naughty teenager but i’m beyond worried for her now. i don’t want to snoop through her things without permission, i was considering explaining to her that i’m extremely concerned, obviously always here for her, but i feel like i need to know what is going on in her digital life/on her socials because i know very well how dangerous the online world has become