"I was told not to undo it once I curse."

An engagement with someone from a higher social standing than one's own family. However, the fiancé apparently doesn't favor this side and is being very insincere. I want to demand the engagement be broken off, but if that's impossible, I at least want to dissolve it peacefully. That's why the young lady turned to a witch. "I want you to curse him." This is a story in the "I didn't think it would turn out this way, but it did!" genre.