1. How did she owe money? Did she need it badly or bought those dispensable things? Her spending is overdrawn. If it is consumption that leads to overdraft, it means that she has no concept of financial management.
As your girlfriend, she should care about you, know your income and know your expenses (you said you would give money to your family and repay the bank loan). Then she should find a way to solve it herself and repay it with her own salary, and then take it from you at the last step. Instead of forcing you to do it. Besides, you have given her 1000 yuan.
3. "Because my family is rural, I don't want to be judged by my neighbors." Because your family is in the countryside, it means that your family is not very rich, and you need the support of your girlfriend more. If she really cares about you, she should share your worries and solve your problems. Or even if you lend her 2500 this time, what about next time? There are fifteen after grade one. Can you handle it every time?
Such a woman is either immature or does not take you seriously. Think for yourself. Money spent suspiciously earned back, but the wife must find the right person.