If she's really in love with you, she'll want to know everything about you. And it's not so she can hold it against you later. She truly wants to discover who you are as a person and use that information to make herself into a better partner for you. It can start with little things, like knowing your favorite foods so she can cook them for you. But it can get a lot deeper than that, too.
For example, if she knows of a particular trauma you've been through, she'll do everything in her power to never remind you of it. If she knows you have a difficult relationship with your mom, she'll stop suggesting that you introduce her. Tell her everything, be open and honest, and you'll notice the improvements in your relationship almost instantly.