She told you that she could only quit smoking or gambling. It looks like manipulation. If she loved you, she wouldn't spend all her money on the casino but would at least try to listen to you and quit, but she doesn't care. You should break up with her because she doesn't respect you, and if there is no respect in a relationship, then there is no point in such a relationship. Try to tell her that you can take her to a psychologist and let him help her get rid of her bad habits. If she doesn't listen to you, then leave her, don't waste your precious time.
