Here is a Jean Smith TED talk where she describes six main signs that flirting is taking place.

H – Humor. When flirting, we should demonstrate our humor because a shared sense of humor means we are more likely to laugh when sharing our thoughts. There are lots of posts about how guys had a great night regardless of their outcomes. Having fun shows your sense of humor and having fun is actually flirting.

O – Open Body Language. We should not cross our arms or turn away when flirting. Turning away is how our body signals what our mind is thinking: “Time to go.” Also, her feet will tell, too. Pointing away? I hope they are toward the bathroom. If not, she's ready to go.

T – Touch. The sidebar says it and so does this TED talk: kino, escalate, touch her! Shoulders are neutral. Keep touching her there and you're asking for friendship. If you are looking for more, move the touching down the arm and get near the hand. TRP teaches to take her by the hand and lead her. It doesn't matter where – to get a drink, to change locations, dance floor. Touching and leading; It's a twofer.

A – Attention. Not just listening and looking, but NOTICING. Notice where she points her feet. Notice if she blushes. Notice if she twirls her hair, licks her lips, touches herself. It's often called “calibrate” here. This type of attention is required to know when to push forward or pull back. Or, when you pull back, did she respond with a relief or sadness? Pay attention!

P – Proximity. This has two forms. I'll call them macro and micro. Women know when you approach them that you are flirting. Do we recognize that when they end up next to us that it is a choice and they are flirting? The micro is getting inside their comfort zone – and yours. The more we like someone, the closer we want to be. The sidebar teaches to escalate. Get inside her personal comfort zone.

E – Eyes. If she's looking at you, more often than feels normal, for longer than feels normal, she flirting with you. Flirt back. Look more often and hold hold your gaze longer, too. Now approach and enjoy the other five ways to flirt.

Smile, laugh, enjoy yourself, get in close, touch her, and pay attention.