Re the selfish act thing, for me, when I have been feeling my lowest ( and I must add a disclaimer that I have never been genuinely suicidal but the thought has been at the edge of my mind once or twice), the suicide option actually seems the opposite of selfish, as all I can see is what a burden I am to others and that their lives would be easier without me. Obviously that is completely ridiculous thinking, but that is what being depressed is like.
Simmy, sometimes pills are the right answer, they can put you in the right place to accept the other help there is out there. Without the pills, my CBT course would have been pointless.