I actually really like most people. But I like them one on one when I can have a real conversation. I hate party chit chat because I'm terrible at it.
I have a couple friends whom I'd call extreme extroverts. One big difference between them and me is if they try to initiate talking to a stranger (at say a bar or some other reasonable location) and get rebuffed or otherwise have a bad experience, they instantly forgot about it and move on - whereas I'm still thinking about it years later.
So yeah maybe introversion is just social anxiety.
It's very common for introverts to still need time away from people they otherwise love.
I was responding to this comment, which seemed to imply that introverts don't have a problem spending time with people they like. Or, at least, they don't have a problem with it any more than non-introverts.
I'm saying that's not the case (but it's possible I misunderstood what you were saying to begin with).