No, no. You are one of a kind and not replaceable. I'm sure that sounds cliché and hard to believe. But please know that if someone doesn't see that about you, then they are missing out on what unique, funny, weird and wonderful things you have to offer them. Many people are going through the day focused on their own thoughts and concerns. They're not thinking about how anything they do is affecting someone else. It's not meant to be mean or to hurt others, it's just the way we are sometimes. I hope you can appreciate the interesting things about yourself, because that's what really matters.