hi Skyline, and I'd also like to welcome to the forums.
Being bullied at school will definitely make you feel socially awkward and frightened to make any friends.
So there are a couple of ways to overcome this such as, are you able to change your position at work so that you can interact with people more, or perhaps ask your family members, siblings where do they go at night time, and you can google this 'socially awkward' there is information here that you may not know about.
There's one thing you can be confident about and this is the experience you have learned from the work you do, so be proud of that, it doesn't matter what you do, it's something you know, that's an asset.
When you look on facebook people make all sorts of comments, whether they are correct or not they do it for self esteem so if you get upset then don't look on it.
Just go for a walk after work or in your lunchtime in the same spot, you will see the same people, they're probably there everyday, just nod your head and smile, or go the same cafe, this is an introduction to meet people although at first you're only smiling, but never think that these people are thinking anything awful, if you do then this comes from you and needs to stop, feel the good within you. Geoff.