Love yourself before love others

Last week, I went to my friend WM shop, She is a pretty lady who own a organic products shop. Fortunately, her friend Mr.M is there with her. I was so upset last weekend, so I share out my feeling with them. They taught me a lots regarding what is 'life' and how to think wisely. I learn a golden phrase in the conversation :' Love yourself before others'.
What they mean here is - we have to behave in a good way, We shouldn't hurt our self(Physically or mentally), We should feel we are good but not too self centered. If we love ourselves - we should not let ourselves to be hurt ( when people back-stab/gossip about us we should ignore it because we can't control how people think, what people said but we can control the feeling to face this all. If we can't change a person, then we should change ourselves.
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End up, I felt great after this conversation. Thx for Mr. M and WM :)

Life is short, Please choose the best way to go through your life. Many people like to live in sadness. Most of the people like to hurt themselves and people around.