WHY DID I CUT MY HAIR!!!!!!!!!

I honestly made the worst fuckin mistake cutting my hair and going bright red last year. It has set me back a million steps back I use to be hot with my long dark hair T^T  Now don't get me wrong I looked really good with my short red hair, but it just wasn't me. So now I'm stuck trying to grow it back. Any tips on growing it fast (please a bitch is desperate )