Big mistake (Bill cipher x Dipper)

The Note

(short chapter)

Dipper finishes shopping forgetting half the list. But he buys: paper, lots of pencils, and moon stones necklaces (in case they need moon stones). He drives back to the shack a bit shaken at meeting "bill". He really douphts himself for thinking it might be Bill. He returns the groceries to the kicthen takes his personal items and himself to the attic. He sets the stuff down and headbutts his pillow.

Mable snickers in the corner of the room. "What are you giggling at!?" Dipper says, bit it comes out muffled as his head is still on the pillow. " The fact that you are head butting" "ohh ya laugh it up". She giggled some more. Dipper really wanted to tell Mable about ''Bill'', he talked himself out of doing that though. He looked down at the wall clock, 10:33. He sat up grabbed some sweatpants, and walked out the door to the bathroom. He changed into the sweatpants leaving on his shirt. Walked back to the room and went to bed.

~next morning~

Dipper woke up. He looked at the clock 3:45. "Why?" He wispered to  himself. He had no idea why he woke up at 3. He yawned, looking over he saw Mable was still asleep. He looked at his desk need the end of the bed. On it lay a note. He walked over and say down at the desk, wincing when the floor creaked. Mable still slept. He opened the note:

Dear Pinetree

I say you at the store the other day, were you wearing Pajamas? Anyway, missed you in the past 8 years. So, welcome back and all and tell Sixer Bill says Hi!

Sincerely, Bill Cipher