Dont feel guilty man, people are going to always make rash decisions. I've been through the same thing with my uncle, shit still gets me worked up. I was arguing really hard with my mom and he was on my side, I had been caught doing some bad stuff while i was a bum and he stood up for me, i never thanked him. he left my house one day after a random visit. the next morning i got the call, of all places a carmax parking lot.

long story short i took it hard, i just took off across state and dipped the fuck out for like a week. didnt even go to the funeral. i went through the stage of "i didnt even say goodbye" and such, but this was REAL he was at my house, joking around and carrying on hours before he did it. I must have picked that visit over in my head a million times since.

You can't help people once they have made the decision in their head. and not everyone is going to have signs or even let it be known that they need help.

Its seriously nothing you did man. just one of those things that some people have to see from experience to actually know what is going on.