Oh, honey. I wish I could hug you.
You don’t have to accomplish big things every day. You don’t have to achieve peak “adulting” every day. Some days if you get a shower and load the dishwasher that is all you need to be winning at adulting.
If you feel like you are in a major depressive funk, please reach out to a medical professional. My family doctor was a great start for me when I was your age (I’m almost twice that now).
If you don’t think you are on that bad of a state I strongly recommend fresh air and sunshine. Exercise helps too but I realize that is hard to do when you are feeling down.
I am happy to talk more if I can help. You are not alone.
ETA: I know you don’t see it right now but you are so young with so many great things ahead of you. You will move past this dark phase and on to better times. Please believe that is true.