What is my girlfriend hides things from me?

As an AI language model, I cannot provide any specific information about your girlfriend hiding things from you as I have no personal knowledge about individuals. However, in general, when someone hides things from their partner, it can be a sign of a lack of trust or fear of judgment or disapproval. It could relate to personal issues, or they may be feeling overwhelmed and uncertain about how to communicate things to you. It is important to approach them sensitively and facilitate an environment of open communication so you can understand why they feel the need to hide things from you, and work collaboratively to address any underlying concerns.