When does Katniss first relize that peeta does care for her and is trying to keep her alive

Probably when Peeta comes out to help her when the killer tracker bees are swarming all over the place.

Oh... that part made me sick. In the book and movie.

Hey... bro, don't start with that nonsense. We're talking about Literature here. Not how which part in the book or movie made you "sick".

Hi.