The Missing PineTree [BilDip]

(Description really tells you nothing about the actual story/definitely not the same)

Dipper is missing.

Dipper has been missing for months. The last day Mabel and their parents saw him was one day before school. And haven't seen him since.

All Mabel found in his room was a note. It was obviously a clue but she was never good at figuring this stuff out dipper was. But when she did get it the answer frightened her slightly bringing back memories.

Bill Cipher

Dipper went back to Gravity falls months before they were supposed to.
Why did he leave a note about Bill? Did they make a deal? Did Bill posses him again?
(Though it may not seem like it this will be a Bill x Dipper story enjoy.)

I don't own Gravity Falls or anything related besides this writing.
(Not proof read)
COMPLETED