"No me importa quién hable de mí porque cuando estoy cerca, no se me dice nada."

Simplified Meaning:

The main idea here is that the person doesn't get upset about gossip or what others say behind their back. They notice that the same people who talk about them when they aren't around are usually quiet when they are face-to-face. It highlights a common human behavior where people feel braver to speak negatively about someone in their absence, but lack the courage to confront them directly. Imagine a situation at school where one student, Alex, hears that some classmates are saying mean things about them. But, when Alex joins the group, those classmates suddenly stop talking and act friendly. Alex doesn't worry much about the rumors because the classmates don’t dare to say anything to Alex in person, which means they aren’t very serious or brave. This idea can be useful for anyone who feels hurt or upset by what others say behind their back. Instead of getting angry or sad, they can remember that if the people talking badly aren’t willing to say it directly, their words don’t hold much weight. It's better to focus on how people treat you to your face rather than stress about what might be said when you're not there.