I agree with a lot of the advice that's been posted. Don't let your weight ruin your life. And realize it's not the weight, but depression and social anxiety, that is giving you these feelings.
I've been a university student for a couple years now, and there are plenty of overweight - even extremely large - people in my classes and around campus who are successful students. There are plenty of larger employees at the places I shop that are good at their jobs.
I hope you start feeling better.
Good luck on your journey.