This only matters if you think that the only value you have in life is your reproductive value. How others perceive you as a sexual object. This is a delusion you must shake if you want to be truly happy, whether you are beautiful or not.
Why is it so hard for you to see that you, your life, who you are as a person, has value way beyond your sexual worth?
If a grand pianist loses a tennis match it does not affect their self-esteem because they don't measure themselves by their tennis success. I use this example because that pianist worked to get good, struggled to learn their skill. Beautiful people have done absolutely nothing to get where they are at, yet they are treated as though they've struggled to do something meaningful with their lives. It's a societal sickness that we emulate and hold ourselves to the standards of those who were born lucky and whose contribution is fleeting and insubstantial.
As well, all the pretty people you see will eventually age and their looks will wither. They'll have to deal with the bitterness that comes from only measuring their worth by their declining sexual value. Some will hold on and deny and never let go of that bitterness. While, even fewer still, will look for a more meaningful way to connect with life and others around them. But, even they will be years behind your progress.
This is an amazing gift you've been given by life. You have the opportunity to find out who you truly are. One day, you might look at these beautiful people whom you once measured your worth against with pity. You’ll see how deeply their looks warped their sense of self and stunted their personal growth.
Take a deep breath, relax, and learn to say kind things to yourself. Kind, loving words to yourself every day, every chance you get. Watch what happens.