Damage control part 1: By sub-communicating there's nothing going on there. Easiest way is to drop in a story about a couple of the girls you've been in the bar with about them and their boyfriends - even if they don't have any. (NOT about how bad their relationship - NOT about how great they are either) Story has to be simple and factual, not emotive. (so as to sub-communicate that you have no real emotional investment in these chicks) Probably something along the lines of "My mate Debbie - you may know her I came in with her the other day, anyway she and her man went to blah blah and did blah blah. I thought to myself that would be cool to do - You and I should go... Then put the high beam smile on and hit the emotional buttons... yeah imagine WE could blah blah"
Damage control part 2: Don't hang out with chicks at her bar unless you want her to get jealous. Alternatively, introduce her to the circle, that way she can "keep her friends close but her enemies closer."
And don't forget - a little jealousy can be a good thing... It'll make sure she knows you're in high demand and appreciate you that little bit more... just don't overdo it especially if she's a girl who can't handle it.