Think about the essence of supply and demand. A lower availability of a supply makes the demand greater, and vice versa. Now, try to apply the concept of supply and demand to human valuation. There is an untraceable amount of people existing in the world. With such a hefty supply, the value of a human should be substantially low. However, there is more to consider. Each humans' characteristics and contributions vary. The uniqueness of a person is what constricts the supply and accessibility, and therefore increases demand. Ultimately, the lesson is that your value is internal. All of us, as people hold and share value as humans, but our individuality is the most appropriate assessment of our worth.
You matter as much as any other person. You measure up to whatever you will yourself to be. This is your humble reminder that you are one of many. Be mindful of others and aware of yourself!!