You can change it the day after tomorrow. If you are sensible since childhood, you can't change it unless you have money and can eat and drink for three generations.
If she had money, she would change herself. If she has no money or not enough money, she will definitely stare at the money and think that some things are of little use and waste money.
There are two reasons for being stingy. One is reluctant to spend money regardless of money, just like my phobia and obsessive-compulsive disorder. One is because life is not rich and people are unwilling to spend money. Some people say they are stingy, but on the other hand, they are better at housekeeping and saving money. Apart from these two normal things, there is another abomination, that is, taking money in your own hands, buying whatever you want, and refusing to buy it for others for various reasons. Such selfish people had better stay away as soon as possible. They are just like vampires, just living a comfortable life, regardless of the lives of others.
What kind of girlfriend do you belong to? The first one can only improve as much as possible, the second one can talk to her well, and the third one can stay as far away as possible.