By Anna Breslaw
1. You're not getting dragged to holiday parties you don't want to go to.
In the winter months, Facebook offers the paradox of choice. Matt your old roommate's Christmas party? Alexandra your old co-worker's Christmas party? There are enough options for just one person, let alone a couple with two entirely separate groups of friends. Come February, your friends in relationships will be baggy-eyed puddles of latkes and rum.
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2. At any parties you're less than amped to attend (or parties at which your exes might be present), you can leave whenever you