Have you tried the usual more exercise and herbal remedies like Kava Kava... you can also Pray to a higher power... taking one's life is the ultimate selfish act...
I've spent more time than I can remember thinking about how suicide is selfish. It is selfish. Everything is selfish. When someone helps another person cross the road, it's selfish. They do it because they feel good. That's not bad, it's life. The issue is not whether it's selfish to commit suicide, it's what has got a person to that point. If the hell inside my head doesn't let up, eventually I have to kill myself out of desperation. To see that as selfish in my opinion is missing the point.