Many times there is a tendency to hold on to the hurt and pain we feel another has caused us. Unfortunately, holding on to this only hurts you.
The mental anguish, frustration or whatever emotions you are feeling are being experienced by you and you alone. For instance, the other person may know your anger is directed towards them but your anger cannot make them feel remorse or whatever you want them to feel, unless they allow it.
You see, you are the only person who can control