I will love you always (Billdip)

(This is my first Billdip fanfic so...enjoy!? :D Sorry if there's mistakes TTnTT I'm only human and I wrote this when I was 11/12 and I was a thirsty fangirl so yea...) •~•~•~• Dipper and Mabel finally come back to Gravity Falls after four long years and everything has changed.Dipper meets a guy named Thad and Bill g...