Stay strong and remain kind. I allowed anger and resentments of the arrogant to take my kindness from me. I'm just now learning to regain that inside me, which makes me a much better version of the real me! Never allow anyone to dull your shine!
Not everyone is going to stay forever. Everyone has someone whom you believed at one time in your life, would always be there. But life has chapters, and not everyone stays a main character in your story. That's Be grateful for the lessons.