title explains it all

How will rainbow dash take it when she finds out that rarity is abusing her girl friend and rainbow's long time crush? Will Fluttershy seek help of her best friend??

Rainbow Dash has had a crush on her best friend AppleJack for as long as she can remember. All her life Rainbow Dash felt she was never loved. Her dad treats her horribly, her mom sadly passed on. She's afraid that if she tells AppleJack her feelings, she'll lose her friendship. One day Rainbow Dash goes missing. What she doesn't know is that AppleJack may love Rainbow Dash more than a friend.