First off you're being a bit grandiose. One person does not talk someone out of suicide or other destructive behaviors. You may have help and probably did but if the were really serious about what ever then one person could not stop them.
Second nobody owes you walk on your own problems. If your helping others is conditional on someone helping you back then it is not a selfless act when you help someone and is quite the opposite it is a selfish act because you expect some sort of reward..
Third it gets better. You need to talk honestly about your problems. That means being honest with yourself first. What part did you have in these problems. I some if not many we play a role in these problems. I speak from experience here.
So you now honest about your problems and you talk to a close friend(s) and or Family and you listen to them and tell them to be honest and there will be no repercussions for what they say.
Failing that see a therapist or a theologian or a doctor. If you are in school or college they have counselors.
Quit waiting on the world to come to your rescue. It's not there job and your foolish if you think they are just going to come without you asking for the help.
Last I've been there. Ask for the help be honest with all including yourself.
Nobody gets a walk on problems we all have them. The world doesn't owe us a damn thing.