Let go of resentment once and for all! Liberate yourself!
It is a healing process in which you stop feeling angry towards someone else. Try to understand what leads some people to do the thing that hurt you instead of punishing them for what they did. It sets you free and you start loving yourself.
You may be holding resentment for a very long time. However, if you really want to be happy and realize that life is short and holding resentment only makes you bitter and unhappy you have to find analyze the situation, forgive and let go.
Pride gets in the way sometimes and we hold ourselves back from forgiving and moving on. It takes a much bigger person to understand why some people hurt us. Looking deeper into the "why" can help in aiding the healing process and allows you to move on. Separating the person from the situation can also offer an insight on why this individual hurt you.
Resentment will silently eats away your happiness—time which could have been filled with love and joy.