You'll know ur good sad when the reason behind said sadness, when told to someone else, sounds stoopid. The reason ur sad is actually quite trivial & ur just bein a baby.
Ryan: I was listening to 20 Good Reasons by Thirsty Merc on the way home from school one day because I was sad.
Erin: What were u sad about?
Ryan: I was crying because the girl I like didn't choose me as her partner in Chemistry
Erin: Ohhh so you're just being emo, that's a good sad