Being hurt by someone close to you is a difficult thing to get past. Every time someone mentions their name, it may cause you to shutter, have the urge to shed a tear, or maybe you are so bitter towards them that you wish they had never come into your life in the first place. The worst part of this is? It is probably a one sided worry. You let all the pain within you go from your heart to your head, and you sit and tire your mind with the aggravation towards the other person. The other person may not even think about what they have done to you. If any of what I just described caused you to say, "Yep. That is where I am at right now," I am going to tell you something immensely important...
You have to move forward. Letting the toxic person overwhelm your mind is only hurting you. You are a child of God, and God is calling you away from anxiety. One of the hardest life lessons I have had to learn to date is you have to accept apologies that you did not receive. They may not come back and say they are sorry for hurting you. In fact, they probably will not. Thankfully, Jesus is the best comforter and He provides the peace. An earthly apology may make your flesh feel better, but when your spirit is content it's easier to start looking forward.
The hurt that you feel deep within your heart that you have never let anyone see because you are too afraid to open the wound again, Jesus has a habit of demolishing in a matter of seconds. Do not be afraid of confronting Him about your burdened heart. He loves you, a lot. He will guide you towards the peace you need, just reach out to Him and ask for His help.