It IS hard, but you will find (almost immediately) upon breaking up and no longer living with her that you will feel happier, lighter, more hopeful, interested in things/people/events. When you break with her, you should make it 100% (her and all her friends/relatives on all social media) and permanent.

Those of us who've left unfulfilling long-term relationships were surprised to find how quickly we felt immensely better. Best wishes on a great 2023!