Not everyone is meant to stay in your life. Some people are temporary. And I know you have heard people say nothing is permanent but I honestly do not believe in that. I believe that some are meant to go, most people in fact. But few will stay forever. We often not see or realize those who stay because we don’t either don’t appreciate them, or we are so focused on people who aren’t meant to stay. You have to embrace and appreciate the beauty of it though. Open your mind about these things more because the sooner you accept it, the better and healthier for you. Emotionally especially. Learn to let things go.