The day Dipper came to Gravity Falls was when you two became best friends... While he's your brother, you're both now 19 and Dipper is thinking of going to college! In a whole other country... You try to protest against him going to college, you're both arguing

Dipper: I have to go! I want to learn more about all the paranormal stuff and maybe get a job as a paranormal investigator! I don't see the big deal!