Join the Conscious Revolution!
Of course, you can't control other people. Not even a little; not a smidge. Every man and woman is their own sailing vessel powered by their own thoughts, emotions, and imagination. You can't improve their smile, nor even add to their woes, unless, at some level, they let you.
So, does that pretty much clear up the effect others can have on you?
You are like Venus, in Transit, on a beautiful journey, we can watch and admire... but we humans have no affect on your journey.