I have the urge to make girl fail University on purpose.
It is serious to cause someone to fail in college, is someone influencing you to do that?
They did the opposite, they urged me to not do it.
If you have good reason to hurt someone's academic career, such as cheating or plagiarism, you should tell the proper authorities and let them deal with it. If you just want to take vengeance on someone, you should not do it; that would be cruel.
I have no good intentions of doing this. I just want to watch them suffer.
There is no justification for doing what you're about to do. Put yourself in their shoes and see how you would feel if someone did that to you. I think that may change your view on this.