Moving on is a difficult decision one has to make a few times in life. You can try to hold on to people who have walked away from you, or you can choose to create a dignified life for yourself.
You can carry your mistakes with you, or you can choose to learn new things to better yourself. Eventually, moving on has nothing to do with people or what happened in the past. It has everything to do with how you REBUILD YOUR LIFE from this moment on.