Isn't it the best to just let the bad emotions leave our bodies and minds to the outer world? They are like toxins poisoning lives of us and our closest ones!
I want to show you why you shouldn't care about what other people think. The lyric is the concept in a nutshell. No one cares.
I recommend you trying to meditate. This is a great way of taking care of yourself. Just f*cking do it, mate! Your future self is gonna be so proud.