Caramel likes Big Macintosh.

Big Macintosh doesn't know.

Rainbow Dash and Applejack are romantically involved.

And just how much does Caramel admitting his crush change all their lives?

Rampant coltcuddling and fillyfooling, in the romantic sense.

Pony magic works in funny ways. Unicorns all have magic they can control. Earth ponies and pegasi have innate magic that connects them to the earth and the sky. And then there are more unusual cases. Pinkie Pie's supernatural senses, for example. And then there's Braeburn, who seems to have a rather unusual effect on other stallions...