Have you read The Four Agreements? Don Miguel Ruiz gives four principles as a guide to develop personal freedom and love, happiness, and peace. With these principles you tell yourself who you are, what you feel, and what you believe.
You will never truly understand the struggles of another person. Remember to realize how hard your own struggles are for you. The other guy feels the same way. We are all trying to make our way in this world so make it easy on everyone and don't judge.