I am 26 years if age and my girlfriend is 24 years if age, she is a nurse and she use old Mercedes Benz, she has being saving some Dollars for 1 and half year to get the new model of Mercedes. I have also save $8,000 in my account, she told me yesterday that I should add $8,000 to her savings to buy the new car. What should I do? I don't want her to see that I am stingy.