Have you felt unappreciated? We teach people how to treat us.
Instead of telling people how to treat you, show them how you want them to treat you by behaving so that you don't become emotionally charged. Forgive the person who has unappreciated you, and direct your focus on people who are appreciating you, and Forgive yourself. You will find the person who has unappreciated you will find someone else to take advantage of.