Should my girlfriend mortgage the house with me?

My suggestion is: if you have a good relationship, provide it before marriage, even if it is hard, and then save some money in your life to let her bear some expenses. I believe she will understand and support it; After you two get married (buying a house is just to get married, you can get married even if you don't get married), so you can contribute together, hehe.

I think it's unfair for you to make her confess, but then you two broke up. If she doesn't want to confess before marriage, there is also this factor. Of course, only 2500 yuan a month is a bit small, and you ask her to donate 1000 is too much. Even if you donate 500 yuan, it will relieve your pressure and represent your mind, so don't be too demanding, let nature take its course and don't force her.

As for how to build trust, it's up to you, of course. What I want to remind you here is that although mortgage is very hard, don't be too stingy in life. I mean, don't spend money like water, especially for your girlfriend, don't buy her flowers, but don't be stingy when she is ill. After all, you are the one who wants to live with yourself.

I dare say that if you regard her as someone who wants to spend your life with yourself, this problem is not a problem.

Note: This answer is based on your love for her.