ABANDONED. Boy looking for person through letters

[Micah]

One of my students saw a book in our library a few months ago and doesn't remember the title. She gave me the description. The cover has a boy (perhaps drawn?) and the story is told from the boy's perspective. He is looking for someone by writing a series of letters. The boy also happens to be on drugs. Apparently, the cover is also a gray-ish color.
If you could help me, I would really appreciate it! Thank you!

[Kris]

Punkzilla by Adam Rapp?

(Google search - site:www.goodreads.com "young adult" boy "looking for" "letters" drugs)

[Kris]

No response, moving to Abandoned folder.

Micah (OP) was last active on the site in May 2020.