So I take the approach that there are some social gatherings I like & others I don't. It is not manditory to like every social situation you are presented with an opportunity to attend & it doesn't mean you aren't social because you don't like some & don't enjoy yourself at the ones you don't like.
I hate crowds so I will not go to social events that involve crowds unless I can have my only little space with a small group at the event. I also hate socializing at bars. People get stupid when they drink too much & I just don't like being around people like that. I have friends that do this & I just don't socialize with them at places like that. There is nothing wrong with being selective in the social events you attend. Go to ones you are comfortable going to & you will have a lot more fun