Sagittarius natives have been known to tilt at a windmill or two. When you get an idea in your head, it's hard to dislodge it until you've had time to check it out.
In love, you can be the same way, obsessing on a potential dating partner until you finally get your way. Though you love a good quest, your sign doesn't do well with major fixer-uppers.
You may want to help someone find their path. But you don't have time to stay in one place long enough to fix their problems. You're off and running on another adventure!