I've met someone on the internet a few months ago, well, last year (2025), and, eventually discovered that they had depression, so I let them vent with me, and I thought I was helping them, until one day they said "I'm gonna improve and be positive from now on", but thanks to another friend, I found out they were lying, they just didn't wanted to vent and I actually prefer that they never vented to me again now. But I told them to vent again, until yesterday, they said a lot of things, including that they preferred that I was rude to them so they ended it all (kill themself), and that all those "happy" moments we spent were just an act of them, and that their depression never dissapeared, just got worse with time. Yesterday, I started to ignore them, since this had me really affected mentally, and I think it'll be better if I go away from them, but I'm scared that they'd kill themself now that I'm gone.