Extroversion is a personality trait - the likelihood of you being the exact opposite, introverted, as a stutterer, is 60% according to the literature. About 60% of stutterers become socially anxious. If you are hiding from people it's social anxiety which is understandable especially depending on your severity. I totally understand your nihilism about new years but posting your sad idiosyncratic interpretation is not appealing, sorry. Keep your negativity to yourself.