How much will you do for her that will make you feel it is the end of the world for you, if she decides to leave you tomorrow?
If you know that much, please, don't give or do it for her. Generally, don't just give to a lady just because you want to marry her. Give to a lady because you love her and want to help her. As a lady, don't collect so much from him that you will feel caged to him, even when you want to leave. Yes, you never asked for anything from him, don't let a guy who isn't a husband or relative take every responsibility that is meant for your parents.
The bottom line is 'give reasonably, and accept reasonably'.
