Most of us are mates with the opposite sex - without actually mating with them. How, then, do you know who's available and who's not when groups of friends go out? Initially, it's easy to confuse friendship and love. Things to watch for, whichever end you're on:
Where do the touch? Women will happily sit on a friend's lap, but will almost never hold hands for long periods while sitting or standing. Theirs or their friend's hands also don't linger in sexual zones - they might playfully pinch a bottom but they won't stay there.
How close are they? In-love couples tilt their heads toward each other. In-lust lovers, mesh the lower parts of their bodies.
What happens when they leave or return from the group? Attached couples usually let the other know what they're up to, through a touch,a look, or words. When the talk, they'll look at their partner more than anyone else, glancing over frequently.