czar,
How I feel is NOT completely up to me. Other people DO have the power to change the way I feel, and it takes constant effort to keep my head up, as it were.
Would you care to tell me how other people FORCE you to feel a certain way? How does that work? Or perhaps you mean that other people may contribute to negative (or positive) conditions which make an impact on how easy it will be for you to choose to feel a certain way.
I favor the latter hypothesis.
Bradley