I dreamed that I and my girlfriend were criminals.

This is your boyfriend's dream, so I can only help you analyze it from your boyfriend's point of view. This shows that in the eyes of your boyfriend, your relationship has temporarily encountered some tests (or hardships). This test is not from the two of you, but from others around you. This other can be relatives and friends around you (doubts about your feelings, worries about your future feelings), or trivial details in your future life. It's normal for boyfriends to have this idea. Unlike women, men think more rationally. This shows that he is reliable to some extent and will consider your future people. Your boyfriend's dream shows that he still has great confidence in your relationship. He believes that no matter how difficult and hard it is, he will overcome all difficulties for your bright future. He firmly believes that his bright future will have a bright future with you. I hope I can help you. Good luck!