My girlfriend dreamed several times that I didn't like her leaving her and didn't want her.

Her psychological fear may also be her anxiety about you and her lack of confidence in herself. You still haven't given her much sense of security. If you can convince her that you only love her, then I think she will be better. This dream is actually a reflection of her psychological anxiety and fear. The problem is still with you. This is also because she really can't live without your performance, so you can also have a little exultation.