Zoey basically admitted that she likes Max, but just doesn't want to date him yet--she can't handle a relationship right now. (Also, SHE'S HIS BOSS, but the show seems to want to ignore that part.) It can definitely still lead to a triangle; Max could find someone else (on his own) just as Zoey is like, "The time is now!"
Regarding Simon, I think that at this point, she's fine not telling Max about him. She's trying to get rid of those feelings and she and Simon were successful in this episode at maintaining a distance, so she probably figures that there's nothing TO tell. At the moment.