We actually ain't too unlike.
One of my nieces is getting married this November.
Can't stand the prick she's marrying, and when she rings to ask us if it's OK for them to come down for a visit, see the baby etc, I go for a walk and tell the mrs to give me a ring when they've left.
Like you say, it's not that I'm really unsociable, I just don't like a lot of people, and can see straight through most horrible c**ts.