Your mother is like my mother, which must make us sisters! We’ve been there for each other through thick and thin, and you’re my best friend in the whole world.
Happy birthday to my true soul sister, my dear gal pal for life.
The fact that you came into this world from another mother is the one and only thing that sets us apart from biological siblings, and you’ll always be able to quote me on that.
Someone like you will always be much more like a sister to me than simply just a best friend. I’m so lucky to be blessed with the best; a bestie so great.