She pays more attention to her phone than you.
If you inevitably spend every dinner glaring at her as she pivots between various social networks and replies to every text message that springs up, don't be too quick to write her behavior off as a sign of the times.
Sure, we're all guilty of being so overly engrossed in our digital lives that we neglect the present moment. But if she makes a continual habit of talking to her Twitter followers more than you during dinner dates, it may point to her lack of investment in the relationship, not just her fleeting attention span. We don't want to say she might be spending your night together making plans with someone else, but stranger things have happened.