My dear younger self, I'm writing this so you might learn some lessons earlier than I did. First, do not be afraid. Your dancing life will eventually come to an end, so be sure to make it a good one. You don't have to dance every class like it's your last, but you're going to be so much happier if you don't hold back. Make "someday" this day. Give yourself every chance to fail and try again and learn as much as you can. Failing in class is not equal to being a failure - it is part of learning and growing as a dancer. Falling on your butt does good too. There's no harm in pushing beyond your comfort zone.
My dear self, stop believing you're less of a dancer because you're not as talented as you would like to be. There are more aspects to classical ballet than perfect fifth positions, high extensions and bendy backs. Musicality, personality, artistry - all these are essential in dance. Be as it may, your turn-out isn't that bad, neither is your plié. You are able to stretch your knees, forward your heels, point your toes and elongate your back. This is not a bad instrument you have. You do not look like a ballerina, but sometimes you almost dance like one. Short but sweet moments, here and there. Enjoy every moment, and embrace all that you can do. Do not listen to the Shitty Committee, ever.
Let your personality shine through (and on very bad days, at least make an effort not to act like a grumpy old woman). Do not worry what others might think. There are worse things in life than looking silly in ballet class. Exercise your smile muscles, let your eyes sparkle, feel the music vibrating on your skin, the floor beneath your plié, the air under your jetés. Do not forget to breath. Breathing has never been overrated. Remember the advice your teachers gave you, and dance from your heart. While you do, keep working on the quality of your technique. It will carry you (us) into old age.
Finally, I would like to say this: It has been an amazing learning experience, from beginning to middle. A journey without end, and a helluva ride.