unique 
1: being the only one
Merriam-Webster's Online Dictionary

We all have those days when we don’t feel that great about ourselves.  Here’s a solution for feeling better on a day like that.

Remind yourself that you’re unique.  There is no one exactly like you.  In all of time there has never been anyone like you.  And until the end of time there will never be anyone like you.

You are truly unique.  Celebrate your uniqueness.

To your happiness!