Things don't have to change the world to be important.

Don't try to lessen yourself for the world; let the world catch up to you.

The world is a better place with Walmart in it.

Just being born makes you worthy enough to be here.

You were seen, you were heard and you matter.

If friends disappoint you over and over, that's in large part your own fault. Once someone has shown a tendency to be self-centered, you need to recognize that and take care of yourself; people aren't going to change simply because you want them to.