OP, you are asking about how to free your thinking and emotions. I want to just recognise the massive growth you have already gone through in this thread. At the start you were asking if it was ok to be impatient with your partner and were largely expecting to be told you should stay and be more patient.
I think you are now at the point that you know this is abuse, and you know the right thing to do is to leave, and toy want to leave and you are beginning to ask how….. how can you overcome the feelings you have? How can you free yourself? That’s huge.
you are going to continue to grow, and you will be able to leave.
in terms of how, a few thoughts. The first, is that on every practical level you are much freer than you think already. Many women are living with, married to their abuser, with shared children, and financially dependent. It is so, so great that you have avoided those things. That was very wise already and showed great instincts for protecting your child. In terms of practicalities, this means ending things should be very very simple. All it takes is a definitive text, blocking, changing your locks if he has the keys. We can even help you write the text.
in terms of emotions, it is of course much harder. But even starting to visualise the above will help you. I know there are resources out there to support that I hope someone can post. The more you read -on this thread and other material about how abuse works, the better… I’d call on your support system. Who do you trust who loves you who you can tell? Are there practical issues that would stop this from being a clean break that you could untangle now? Does he have passwords to anything you could change now etc?
you will get there OP. And we can be here as long as you want. You are doing really well.