Not knowing

That's the worst thing.
Not knowing what you've done to cause someone to stop talking to you.
Not knowing if you've offended, caused pain, or in some way hurt their feelings.
Not knowing if you've done something right.
Never knowing from one day to the next, or one minute to the next, if you hold any importance in another's life.
Knowing that all you can do is be yourself, but not knowing if yourself is enough, or too much.