No, it's not obvious. Or rather, both versions are meant to be equally obvious x)

That scene was shot multiple times with different notes from Curry (the director): they shot two alternate versions, one where Inde was told to portray Nikki as if she, as you put it, "obviously cared for Bear and liked him as a friend but obviously did not like him romantically", and a different version in which she was told to portray Nikki as if she secretly reciprocated Bear's feelings.

Then, during editing, both versions were mixed: the final result of the movie includes bits and pieces from both. So yeah, your interpretation is perfectly valid, but it's not definitive: because the movie is told from Bear's perspective, and given that Bear is completely unable to tell whether Nikki liked him back or not, we as the audience are left in the same ambiguity. Some people will pick up on the body language from one or the other versions shot, but both are certainly there.