I met this girl in the psych ward when I was 14 - she was 16, she had bright blue hair and we shared the same birthday, even.
We got along really well; however, after a while the contact just faded. Only about two years later I found her best friend on social media, who had coincidentally also been a patient at the same time as me, and we texted a little.
I was thinking of texting the other girl, ask for her social media, but decided against it. A day later I found out she took her life the night prior. It wasn't surprising, not at all - she'd been horribly depressed for years and even lost her mother. It wasn't surprising, but it was insanely painful. We hadn't talked for two whole years, at some point I'd even forgotten about her, but upon hearing the news I cried for multiple hours for days. I'd never dealt with loss before, and it was confusing for me how those emotions came just like that. I was told there's nothing I could've done; and I know that's true, but I wish I could've just talked to her one last time. It's been three years and I'm still not completely over it.