ABANDONED. YA Romance - Antisocial orphan girl afraid to commit to anything collaborates on art project with street artist

[Milan]

Main female character is an introvert and her best friend tries to set her up with an extroverted guy from school by having them illustrate a steampunk graphic novel she wrote. I'm pretty sure the guy's name was Fox and he had dreams of tagging every bridge in New York City and going to a baseball game in London. (view spoiler)[ They get together, but break up because of her commitment phobia, she follows him to London, they make up and live happily ever after (hide spoiler)]

I read it a year or two ago and I think it was published within the last 10 years.

[Marisa]

I think I found it!! Took me a good half hour of Googling different keywords...is it Are You Mine?

[Kris]

No response, moving to Abandoned folder.

Milan (OP) was last active on the site in September 2020.