Well, I myself was bullied from grade 3 till grade 9. Didn't stop until I moved, even though I was bigger and tougher then everybody else in my age group -- I'm not violent enough to go about kicking ass and taking names. So I just endured.
Anyways, for the longest time after I was a loner. Still am, but now its by choice rather than the demons and negative thoughts and self-hatred keeping me locked up. Always thought I was ugly or something was seriously wrong with me cause I had trouble being sociable with others even though I wanted to. Missed out on all that sorta stuff when I was getting picked on, so it made it harder to interact with people. Whatever trust issues I had arose from my own self-loathing and doubting pretty much everything when I was interacting with people ("Are they really being nice or are they being two-faced?"). Missed out on alot of chances with women throughout the years thanks to my own stupidity, hindsight being 20/20.
I realized during that time I needed to change and improve upon my ability to be sociable and not a complete mute. I rather like the results as I am rather verbose and gregarious when need be compared with how I was a little over 10 years ago. Women do not petrify me like before. And so on.
"By Design." Is what I told myself. So I got a job where I was interacting with the public on an almost constant basis. Actually practiced how to smile in the mirror too, lol. That helped in dealing with people on a formal level, greetings and being polite and such. It also provides a framework for when dealing with your co-workers as well; you're just there for work and self-improvement, and being able to socialize ("Shoot the breeze") with them helps further expand, refine and most importantly, learn social graces for when dealing with people, like women.
Its like that theory wherein the more you expose yourself to something the less "shock" value something has. Only through interacting with a myriad of people can you eventually learn to overcome your social anxiety. There are alot of people out there whom are more than willing to give you "life advice" on pretty much anything -- older more experienced bros to those sexy cougars. You'll only be able to find such people when you venture out into IRL MMO.
Will this 100% cure you? No. But its a start. Its never easy, there will be awkward moments where you'd want to die from embarassment. However, nothing good is ever gotten easy. As much as you can sit there and be try to unravel everything through introspection, sometimes you'll just have to let it go. Pain, suffering, torment. No use in hanging onto a past that just weighs you down. Use it as fuel for a better tomorrow ("I won't let them beat me!"). Save yourself some time and realize you do have worth, you do matter and you have qualities others would find attractive.
Right now you're going through Hell. Just keep going. Its not infinite, even though it may seem to be. One day with the right tools, hardwork and determination you'll eventually end up in a better place, and then whenever you have to revisit Hell it'll be a walk in the park. :)