Humans are creatures of habit, especially with behaviour caused by systems of oppression (patriarchy, sexism, hetero-normativity, etc.). This is why it can be so difficult to pull yourself away from a bad relationship, and why it can seem easier to stay with or go back to someone who is bad for you. However, freeing yourself from the grip of an unhealthy partner is one of the best things you can do for yourself and your future.
In order to move on, there are a few steps you will need to take. As the process of unlearning is continuous, you will need to revisit these steps more than once, but each time you do, you will have new knowledge and understanding that will make moving on easier and help you to form healthier relationships.