This one is going to be really vague, but maybe someone out there remembers the fic I'm thinking of.
I read this a long time ago, and there's only a few details I'm sure about. I remember there's something going on with Justin (big surprise)...he and Brian have an argument (maybe), Justin takes off and Brian drives himself crazy trying to find him. (I know, that sounds like a hundred-thousand fics...)
The original part I remember is that Justin ends up at a park (or someplace like that) and it's Cynthia who finds him. Justin asks her not to tell Brian where he is, and Cynthia takes Justin back to her place. She lets him stay with her while he deals with whatever he's dealing with (and I think she gets him to see a shrink.) Eventually, Brian finds out Justin's been hiding out at Cynthia's, and he gets pissed. I think Justin finally goes to see Brian, they talk and things get resolved.
I'm sure I didn't dream up this story. Does any of this sound familiar to anyone? Thanks for any help.
Edit: Found. It's "The Eye of Your Mind" by walmer92. Thank you to helelena for knowing which one it was. Link is in the comments.