Forgive yourself for having chosen to expose yourself to people who don’t care about your feelings and help others to do the same. Enjoy life! It is as simple as changing your focus or perspective when you start thinking about people from the past who hurt your feelings.
Eventually, you will forget about those types of people because your time and attention will be taken up by more positive things, people, events, activities etc. When you understand how much time is wasted trying to make people see you, understand you, respect you, value you, like you or agree with you,life becomes a pointless negative fight for validation that will drain your happiness.
You are worth more than the indifference, In attention or crumbs people throw you. You are a queen that demands respect.