I understand...this is what happens when we let ourselves change who we are and how we act because of the behaviour of another. When we worry about the outcome, this is the result.

I would respectfully suggest that you might be feeling "not so nice as you were before" and "uncomfortable with yourself" because it is not like you to not be kind. Your natural way of being is kindness. Being kind for the sake of it is what makes us happy and lights us up. It is how we are when we're truly connected with our higher selves.

The more we become distant from our higher selves and stop behaving in those beautiful "higher self" ways, the worse we feel.

The best way for you to feel "nice" and "comfortable with yourself" again is for you to return to that place of connection with your spirit - your higher self - and be kind, even when it isn't appreciated, even when it isn't noticed. This is not about the person on the other end of it. It's about you, doing what your spirit came here to do, and being in alignment with the purest part of yourself - your beautiful soul.

When you do this, you'll begin to feel better again. Think of that person as a wounded soul, because the miserable behaviour you witness is a manifestion of whatever emotional wounds that person has experienced. If you can think of it that way - and send that person love and light or at least kind thoughts - it can help you to look past the behaviour and see that there's a wounded spirit in there somewhere.

Maybe that will help. But certainly, being kind is about you expressing your own spirit's essence. Withdrawing it will simply lower your vibration and make you feel miserable.