You may be out there playing the field like Derek Jeter, but your social media feed can communicate another story entirely when your flavor-of-the-night checks into the bar you just walked into, and tags you. Remember what we said earlier about keeping the details under wraps? Thanks to Mrs. Social Media Happy, you've just violated that rule and essentially rubbed her nose deep into your business. It's rude to her, and it makes you look gross. Really.
You're not big brother, so you can't exactly order her to stop using social media. What you can do is make your Twitter, Facebook, FourSquare, and Instagram private, and opt not to accept her friend/follower requests.
Yes, you'll miss out on tweeting her, but you'll gain peace of mind knowing that you're not unwittingly broadcasting the details of your personal life.