My friend's super depressed and I don't know what to do.
What's got you so worried about the situation?
I'm really scared because I've seen this before with my grandmother, and she would hurt herself.
I'm sorry your friend is going through some stuff. He's lucky to have a friend like you who cares about him though! Have you talked with him about getting the help that he needs?
I've talked to him about it and tried to help, but part of me thinks maybe it would be best if he actually just killed himself. That sounds bad, but if he's really so unhappy, maybe that would be the best thing for him?
He may be in a dark place, but he still is an important part of people's lives, and it's wrong to tell him that. Don't advise him to commit suicide; instead, show him support, be there for him, and give him advice. With therapy and medication, many people can return to a better life!