I disagree. Dancing with other girls will show DHV. But what I think Magnum is getting at is that you can't make it look like you are smiting her. It's much better to be busy opening up a set or proving social worth than to stand by and watch. I would try isolating her more. Go out with her alone or invite her to your place if possible. Don't take her to bars/clubs where her BF or anyone she knows may run into her. It sounds like she enjoys the attention, just get her alone and pull the trigger.

There you'll never know until you try something make sure you escalate first though

Dude, just to get your head straight here. This chick has a BF. Most girls in this world are not comfortable with some other guy touching them up when they have a BF because guess what, they're in a relationship. That said, there are some that cheat.

Now it sounds to me like she likes the attention but doesn't want anything more. But should you really be spinning your head about this? No. All that you should care about is what YOU can control. So what CAN you control? Yourself, what you do, your actions and words. That's all you should focus on. What you want and the actions towards that. Now, if you want sex here, what's the thing you can control? Taking action towards that and staying congruent to it. Remember, being congruent is what's important, even if she calls you a creep, you stick to your guns and say "Hey, I'm attracted to you, and there's nothing anyone can really do about that, unless of course you start stuffing yourself and put on 100lbs". However, that also being said, make sure you are willing to let her go, too. She's got a BF. Don't just expect her to hop into bed with you. She may not even really be that attracted to you, just want the attention. But maybe she is...see it's pointless thinking about it. But just take into account that she does have a BF and that it might not work, in which case you have to accept it and move on.

I'd say get her alone and make the move. Escalate and make the move. Your escalation should be both physical and in the vibe. If you notice mutual attraction and a window of opportunity, either voice that you want to go for a kiss ("I can't stop thinking about kissing you right now") and if she complies, kiss her. If she doesn't comply, that's not a no, it's just resistance (if she stays it's just resistance). But if it's a definitive no, then don't do it. But that's really all you can do. Control what you can do. And now do it.

Good luck.