I'm proud of you!!! It is SO HARD to cut someone off and cut contact. You know in your heart what needed to be done and if your life depended on it you are doing the right thing. Only you know if you need to reach out to him for closure. I would suggest that if you do at least wait a bit so that your emotions aren't as raw. Take time to heal. You are not bad for doing what you need to do to change your life in a positive way.
Read a lot here. You will learn from others.