I was much the same was as the OP, no life, found out my friends were not friends, dont think i`m attractive, living at home, no job, no social skills and couldn`t even leave the house most days. I felt like i was going to die alone and was wondering if life was even worth living, i`m not ashamed to admit i curled up in a ball and cried like a baby. I just couldn`t take it anymore, i started seeing a counsellor, medications and started to motivate myself to overcomes me fears, change my thinking, not putting myself down. It is these seemingly insurmountable fears that hold us back from out true potential. Our minds like to work against us and we tend to fear the worst case scenario`s all the time. It`s not easy but learning to put the fears aside as irrational thoughts is the first step, each step after that gets easier. Just remember not everyone see`s beauty in the same way, to one person you could be hot and to another not so much.
I`m by no means cured of sa, but i have made one new friend since i started making changes and it makes a big difference. The more i talk with him the better my talking becomes in general. From there i have even progressed to probably one of the most scary and self esteem crushing things know to man-woman, the dreaded dating world. I don`t expect you to believe that this can happen, i know when i hit bottom a few months ago i got much the same advice given to me and i laughed it off. But it does work you just have to want it bad enough and to keep going.