The Ending According to Me

"Fluttershy, I promise to never keep my feelings a secret again!" said Rarity.  The two ponies embraced and made their promise official.  Photo Finish trotted into the room, but the ponies simply laughed as Fluttershy quit her modeling career.

The two ponies trotted down the streets of Ponyville.

"Fluttershy."

"Yes Rarity?"

"Now that we promised to be open about our feelings, I guess I should tell you this.  I have a huge crush on you."

"No you don't."

"Okay."

Fluttershy smiled.  The stare works every time.