when i listen to this song, I think of a person who had toxic and fake friends, who really don't care about that person, and would be rude when he or she was feeling down. Basically, they're just using him or her. Eventually, the person left those toxic friends and was happy that they did. he or she now has a peaceful life, due to choice of leaving.

as you can see, i made the skin pretty jovial. I made a smiling face, and tried to go for a kiddish style, with the down-buns.
I used yellow because it's mostly a color that represents happiness. The blue is supposed to represent calmness, and can also represent sadness, from when she (gender of skin) was being used by toxic and fake friends.