This right here is the reason Derpy is my favorite Pony. While most of her fanon involves her being silly and comedic she is really often used for warm heart felt stories. I'm always Dawwwing at Derpy and Dinky because they're Adaaaawwwwwable, more than any other characters fanon or canon for me.

Dinky and her must never fall apart. They will be happy till the end of time or someone will have me to answer to.

Oh and Derpy being immortal and not aging actually fits with a fanfiction I'm keeping up with at the moment at the moment, The Life and Times of Caughlin Mare. Isn't that odd.