Mentally In Love {Mashley FF}

Mitch has had a crazy life, and he's going through more. His older sister, Kayla, has been trying to help him through his troubles. Things go all happy and amazing for him, until one person skips into his life. An old 'friend' wants him back, but he's found someone else who loves him and he loves her. Who is this 'friend'? Who is this girl he found?