Pity Party by Melanie Martinez
It's about the character, Cry Baby, that Melanie made when she started writing her songs. So Cry Baby sends invitations for her birthday party to her friends (who aren't really her friends) and when the day finally comes, no one shows up. She starts overthinking her situation with complicated feelings and soon loses it.
Your on the right track, but you have to look at the mental aspect instead of what she's literally singing. in other words, you have to interpret what she's saying not write out what she said in different words. See what I just did? The first and second sentance I wrote mean exactly the same thing but in different words which is not interpreting what I said.