There is no Carlos and Adam dating route. There is one Carlos and Adam CG, but it's associated with the "bad route" (which isn't exactly a route, but it *is* bad).
Glad you're enjoying the game!
(If you want some more Carlos and Adam platonic cuteness, I just finished up the post-ZAGS series of writing AAGS: http://zags.bobcgames.com/zagsfics/aagsindex.html )