That's right, you're, basically, the Anne of Green Gables of friendship...
... and that means you are AMAZING. No one was a friend like Anne Shirley. She was a bosom buddy who took friendship very seriously. Anne was willing to do anything in behalf of her friend's well-being, and she constantly put her besties' best interests ahead of her own.
You have one of the biggest hearts in the world, and this is what makes you an incredible friend!