I think most of the time what others have said being the motives of suicide is true.
But I honestly think there's a third cause, but this is more commonly found among people who just consider or threaten suicide rather than those who actually commit suicide.
I think sometimes someone tricks themselves. We've all seen that person where nothing is actually wrong, their simply paranoid. They may say to have something such as deppresion but it's more of a self-diagnosis than fact.
I think sometimes people want the attention, want to be noticed, want to believe something is wrong with them so badly they subconciously make it so. They want to feel as if something is wrong so someone else can cheer them up later (but they may drag it on like some soap opera). But they slowly start to become convinced it's fact, soon they started to do subconciously for the sake of attention ended up subconciously making them feel suicidal.
Now granted, most of the time suicide or consideration of it is due to legit and serious reasons. I'm just noting a minority that I believe most people tend to ignore because if they addressed it they'd probably end up being labled as a troll/hater, insensitive etc.
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