Am I being a bad friend/coworker if I skip the company Christmas party even though my coworker has nobody to go with?

Most people will have a plus one (spouse etc), and I know I should go because it's a company Christmas party at the company I work at. My coworker/friend really wants me to go because she has nobody to go with. But I don't want to go. Am I being a bad friend?

Am I being a bad friend/coworker if I skip the company Christmas party even though my coworker has nobody to go with?
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