Why do I hate parties?

I went to a party last night. I go there every year at this time. I never see these people any other time. But we talk about what we did since we last saw each other and I always go home feeling like it was a futile waste of time. These people don’t care about me and I don’t care about them and yet we stand around chatting superficially once a year as if we both do. I always feel like this at parties. Is there something wrong with me?