Introverts do see themselves as threatened species. What I mean is that they feel overwhelmed in the crowd and most times misbehave in such environment. I, for instance can relate to this. I feel so consumed and inadequate when I’m in a place full of people. I won’t say this has to do with less self confidence but seeing a lot of people who share little or nothing with me turns me off.
I try to belong when I find myself in such environment. Act as a Roman when you are in Rome, right? At the end, I come back to myself and count my gains and losses of moments ‘wasted’ sitting with people. Understanding who yourself wants to spend time with is very important. Most times, you really need to spend more time with yourself. This is not being anti social. I believe we are not meant to force ourselves on people or to belong to a group. But, a little advice goes thus, try to belong sometimes not to displease yourself but to spend time with people who might be in dire need of your time and attention. You can always have yourself afterwards.