Thank you for sharing this with us. It takes a lot of courage to speak the truth about painful experiences. I'm so sorry you're going through this. It's not fair to be compared to someone else and expected to meet unrealistic standards.
Please know that you are not alone in feeling this way. Many people hide their struggles behind a mask of perfection, but it's important to remember that everyone has their own unique challenges.
It's understandable that you feel trapped and scared. You're not alone. Fear can be overwhelming, but please don't let it dictate your decisions. You deserve to be happy and free.
Be patient and kind with yourself during this difficult time. This will pass. You're at the age where you will be out of the house soon and have your own life and that's something to really look forward to. No one will be your boss and you can rule your own life. This is only temporary. Find things that you really love to do and wrap yourself in those. Maybe hang out more with people your age and go out and have fun and do things. This will take your mind off of things that feel overwhelming. I hope you feel better soon.