To answer your question, no I have not been bullied since middle school (really, high school if we want to count what butthurt ass exes have done), but I understand your frustration.
Honestly, a lot of the advice given in this thread has not been good. "Standing up for yourself" in the way they're suggesting isnt easy (both in practice and mentally) when you feel like you're in this by yourself and when whomever your standing up against seemingly has an army, and it could honestly start more problems for you.
Please use the resources and suggestions I gave you in my last post and start doing things that make you happy. I know that situations like this could have you questioning your self worth and I see that it has you questioning whether or not your life is worth living, and I want to tell you that it is.
Until you can speak to someone professionally, please try to find something you find enjoyable to at least take your mind off of it briefly.