You learn when you push out the people in your life that only use you or want something from you, you become happy, when you let these people back in your life you'll notice the pain that returns.

For yourself, Run. Don't turn back. Block them. Delete them. Keep them away. 

You are more important than the feelings they give you. 

If they don't like you pushing them out because of their treatment, then they were never true friends. 

True friends would understand if you need a break, if you need a hug, or you need space. They wouldn't make you feel like for taking said break or trying to push out the toxic things in your life. 

You don't need it. 

Focus on your happiness, start small, add a couple people, expand, if people up, kick them out of your circle. Only those who hold your heart with the fragility of a glass rose deserve to stay in your life.