I've been following this subreddit for around three days now, and I've gotten a lot of insight from it.

Though so far I haven't read much about girls in pairs, as you may have noticed, girls usually walk around with a friend or such.

I understand that, when girls are in bigger groups, you're supposed to single out your target and isolate her, right? I'm guessing that doesn't work when there are only two of them, since you would leave one of them alone, and it would be a dick-move.

tl;dr: How are you supposed to hit on a girl with a friend without making the other feel left out?