Not a hard concept to understand or do! If someone wasnt faithful with you, they didn't love you. They didn't care about breaking your heart. When you truly love someone, being faithful & trusting someone is the most natural thing.
To me this art is saying that you show one thing but feel another. you can show happiness but still feel caged in with nobody to turn or talk to about your feelings. Amen to this, you never know whats behind the curtain