Dipper's Heart Shaped Box

Oh man, you gotta love these sad and morbid Gravity Falls drawings I do. Well, what's the story behind this?

Dipper was on his way to give roses and a box of chocolates to Wendy. It was starting to rain, so he needed to hurry. Suddenly, he bumps into Robbie. Seeing the chocolates and roses, Robbie knew instantly what Dipper was going to do.
"Hey Twerp!" Robbie snarled. "You gonna give those to my girl?"
"As a matter of fact, I am!" Dipper answered.
"Really? It would be a shame if you dropped them!" Robbie then swatted the box of chocolates and roses out of Dipper's hands. "Oops!"
"NO!" Dipper panicked and attempted to pick them up quickly, but Robbie stomped on the heart-shaped box.
He then added insult to injury, "I already told Wendy that you have a thing for her. She thinks it's pathetic and she's a bit weirded out by you now." Robbie was lying, but Dipper was too crushed to say anything back. "Enjoy the rain, kid! Hahaha!" Robbie left...and Dipper is all alone soaking in the cold rain with a stomped heart and a letter for Wendy. The letter contained a crude, yet charming doodle of her, which she will never get to see.

EDIT: This was before we got to know Robbie a little more, so yeah I know Robbie's not downright cruel. Just trying to act tough.

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