I think he did feel that way at one point, but now just loves him as a friend, but hey, things can change so quickly in the soap world. - maybe he still does, maybe it'll come about that's the reason his relationship with Ed ended so quickly...
I don't think anything will happen between the pair though, you can't just turn gay, especially a "womanising" character like Adam, who'll seemeingly jump into bed with anything with boobs.
Despite Adam (Thomas) saying in an interview that he wouldn't care if Adam turned gay so as long as he can snog Aaron, I doubt it'll happen!