Its an personal choice not a very good one you just eliminate the chance of things ever getting better. You are alive,now and never more. Why would you shorten the experience of living once death comes knocking you will be dead for an eternity but for now you were given a chance to live I don't see a single reason why you would like to end your life.
Isn't it enough to see that a garden is beautiful without having to believe that there are fairies at the bottom of it too?
-Douglas Adams
-Douglas Adams