Understand 'string along' often involves emotional manipulation, usually negative feelings. She finally realized she was being strung along and ended the relationship.
Pro Tip 2/3
Doubtful Intentions
'String along' may imply the person has hidden motives for their deceptive behavior. I think he's just stringing us along until he finds a better job offer.
Pro Tip 3/3
Not Genuine
The phrase often suggests the person's interests or affections are not genuine. Don't trust him too much; he might be stringing you along.