@bluebicycle: Perhaps. I wouldn't have known anything about it if they hadn't posted it all over Facebook. Then when I commented on something about the party, one replied, "It was planned last minute."

I'm not super disappointed about the situation. Although being left out by people who label me as a friend is somewhat painful (it takes me back to high school, a time before I had accepted who and what I am and rejection was excruciating), spending time with them isn't particularly fun for me. Their interests are far different than mine. The only glue that holds us together is the fact that we attend university together. They're the "let's get a bunch of people together and drink and party with loud music!" crowd while I'm the "let me get my closet friends in one room and watch horror films and play cards for humanity!" type.