Sammi,
There are habits and there are emotions. Then you have a relationship with someone, part of it is habit and part of it is emotion. When you break up, you make an
intellectual decision to break a habit. It's not easy but the
emotional part is so much harder. That comes with time. You must be patient and let the emotional part die down. It's really hard, I know.
You made an excellent decision. It was a decision that is for your own best interest.
There's an old joke about a person who had a habit of banging his head against a concrete wall. Someone asked him why he did it. He said, "Cuz it feels so good when I stop."
Sometimes that joke makes sense to me.