I wanted to commit suicide long ago, when I was between 14 and 16.
I am very happy I didn't. Even though life seems bad sometimes, and 12 years later, I am still suffering from SA, I have experienced many positive things. And nice things don't always have to include contact with other people.
As long as you have some nice things in your life (books, video games, chocolate), it is always better than not living at all.