Dude, calm down. This girl obviously pays great attention to money. Your feelings are based on money ... tell her that you already have a beloved girl.
Remember, your current girlfriend is the best. You can't hurt her, okay?
Does your ex-girlfriend have a family? You talk to his family. If it doesn't work, warn her that there is no fate. If she comes to disturb your life in the future, you can report it to 1 10.