Adam
Every single individual is vital. Even now. You may not see it, but they are, Adam. Life is valuable. It has meaning. We all have a place, a purpose. It may take us time to find it, but it's there.
Maybe...that's why you've been brought here. To see things from a new perspective. You can help people here, Adam. Think of the lives you could save! Or the good you could do with the time you have.
Don't concentrate on yourself, don't concentrate on the things that make you unhappy. Push them to the back and think about others. Because it's only when we live for others that we can really find ourselves.