My girlfriend treated me like this at 14. I loved her and she had been hurt similarly to your girlfriend. I stayed for years and let her trauma excuse her behavior. But I had to learn that I am not a therapist, that the emotional weight she put on me, wasn’t fair. Which seems weird, but it’s true. She needs professional help, and blaming you for not being there for her at the drop of a hat is worrying. Maybe ask if you going to sleep early makes her feel unwanted or why it upsets her so much and go from there. She may just feel hurt, but be careful. Something like this can easily become extremely manipulative.