Suicide isn't always about their own desire. Sometimes, more because of what other people say.
You all always say to them :
"You're weak"
"You shouldn't be that way"
"You better just give in"
"You can just go first"
"I'm busy"
"Can I see you later?"
"Why are you complaining about this? "
"Can't you try more?"
"Everything will be okay"
"Can't you stop? I'm bored about that topic."
"You're getting arrogant"
"Could you not have to act strange? "
Don't all of you feel you are too bad? You don't know what he went through. You are not on his way. How can you judge, when you don't even know what happened to him. You always act that you are right. You always act like you just said it didn't mean anything bad. Yet you know that he may think harder for what you say. You don't think he's trying his best because you can only say what you see.
You don't want him to feel comfortable in the slightest. If he gets angry, you act quiet and think "later when he calms down". What if he is uneasy and thinks about suicide instead? You don't know how hard his life is. What if he felt like nobody wanted him to live? You guys don't be too selfish to give in and stay by his side.
IF THERE ONLY ONE PERSON SAYS "Maybe I can't help you solve your problem, but I am there for you if you need me." HE ONLY NEEDS ONE PERSON SAY THAT TO HIM. ONLY ONE. Maybe he will think that his life is useful. Perhaps he would think that if he was at his lowest, he would at least know who to run. At least she knew there was still one shoulder for her to lean on. At least he knew there were still people who would listen to him and believe him.
But that's just a presumption. When he is gone, you will act as "I should have said with him at that time" Then you seem to be pondering why he acted like that. Why was his mind so short at that time. Until you know that his life is very, very hard to live but you are still do not care or even burden him with your words. Do you remember that words are more painful than deeds?
Think again if you want to do bad things to others. You don't want to hurt her and make her feel inferior to her thinking that she is unwanted.