The first thing is admitting our feelings of resentment, finding out the cause, and then seeking help.

Your story is inspiring, and I'm glad you get back your power from such boss.
Forgiveness is a powerful thing, we must learn how to always forgives those people that wronged us not because they deserves it but because we deserves to be truly happy and that can only come from forgiveness.

I wish you all the best at your working place.❤😍