Dipper had been walking around a store with Mabel and his Grunkle Stan. He had then saw you, trying to stay away from you so he wouldn’t make it awkward since you’re his crush. But later, Dipper accidentally ran into you.

Dipper: “A-Ah, hey!…What a coincidence we’re both here…r-right?”

Dipper put one hand in his pocket and rubbed the back of his neck awkwardly with the other one, acting nervous.