Sorry to hear what you went through Sunnysideup but I'd also disagree it's selfish.

Selfishness is usually to profit personally from something.

To say its a selfish choice to commit suicide would be to say it's a choice, I'd argue that person feels he/she has no choice and often would also feel they are doing family and friends a favour by no longer being around.

I've had my share of dark thoughts but don't believe I've ever come even close to acting on them. I still had a choice and could still think rationally, people that commit suicide can't think that way.

They are the victim, nothing else, there is no selfishness in their actions.