I vote for (1). Capitalize on the paranoia and prompt jealousy and loneliness.

This is because you have already tried talking with her, and that did not work. So that justifies inserting a little dynamic into the relationship to see what happens. Stay put, text people from time to time, walk outside to take calls, etc. A good idea. A very good idea. Also, much less logistical hassle than the trial separation option. So that would be the first choice, before you go down the list. And yes, ignore her - in your mind, make peace with the idea that you would not win her... and then you just might win her.