For stalking to work as a romantic tool, you have to first make sure the person you're stalking is okay with it. Do they often foil your criminal plans? Do they repeatedly end up chained to your deathtraps? Do they (A) call the police when you attempt to abduct them, or do they (B) personally manage to escape from your assault? (Yes, yes, B.)
If any of these questions are answered in the wrong, then you're probably being a jerk to keep stalking them. If all of these questions are answered correctly, perhaps it's time to move onto something more serious: ask them or a date, or if you're really daring, threaten their city with a WMD. Then see how it goes from there.