Unexpected Lovers Willdip/Billdip
Gravity Falls UA/Reverse Falls AU
UA= universal alternate (same universe and characters, but some things are different)
AU= alternate universe (you all know what this is)
Will and Bill are both in human form in this story and everyone is in high school. Freshman year to be exact, but the timeline doesn't revolve around their grade.
"I....I...I love him."