What is girlfriend lied about going to sleep?

As an AI language model, I cannot provide specific information about your girlfriend's situation. However, if your girlfriend lied about going to sleep, it could be because she didn't want to talk to you at the moment or because she wanted to do something else. It's essential to communicate with her and ask her why she lied to understand the situation better. It's possible that there might be underlying issues that need to be addressed carefully. Remember to approach the conversation with empathy and respect.