I am a manic depressive, so I do find it frustrating not being as good as I want to be, or should be. But my friends are always telling me that I'm great, n that helps a lot. But due to a stupid ****in chemical inbalance, it holds me back a lot when it comes to the confidence side. Some days I think I'm so bad that I'll stare at my guitars n just wanna throw them outta the window, so on those days I make sure I'm not around them. But on other days I will sit n do some riffs off the top o my head n do a **** hot solo n think **** I'm good. Thats very annoying, I'd like to find a nice level where I can think that I'm good(on the days that my confidence isnt up), but still good on the good days. So I would say playing around people does help my confidence, but only if I know the person.