Thank you for your Question
It isn’t Islamically ethical to have ill wishes for someone.
According to your Question, if this is still a test from Allah then the end result would be for you to be able to get her (although allot of things are involved before this happens), then why would you pray for ill when it might happen (May be?) in a natural way!?
So either way, whether she breaks away (God forbid) or not her happiness will be what will bring her to either paths.
In that case you prayer for her happiness will be the best prayer for her and yourself. Because it will rest your thoughts and bring tranquility.
InshaAllah your are able to settle in life and get the best in both worlds.