I saw a FR of yours a while back. You already know how to do all of this but I think you're trying to benchmark the "I like you, you like me" example too much. The only reason why that particular conversation flowed the way it did is because a forum member and I worked on it together during a chat; it was specific to his situation and that girl. The point of that thread is to "demonstrate" your interest and your desire to go out with a girl instead of "telling" her your interest and your desire to go out with a girl. The point is to treat the girl as if she is already your girlfriend.
You don't tell a girl you've been going out with for 6 months, "I like you. Can I take you out to dinner?" No. . . "Going out" with your girlfriend is standard protocol. And you naturally demonstrate your attraction for her. . . How?
You demonstrate physical attraction.
You get her gifts once in a while.
You do in fact 'tell her' that you are attracted through language.
You spend time with her.
You do her "favors".
You make her smile and laugh.
Sometimes you put her in her place. Etc . . .
^Not one is necessarily better than the other but there should be some balance right? If you NEVER spend time with your girlfriend but you tell her every day, "I love you, I love you." - Does this make sense? If you never tell her that you're attracted to her but you come around to screw her every day, does this make sense? If you never demonstrate physical attraction but you want to spend 'quality time' with her all the time, does this make sense? You'll see on this forum that guys will often grab one component of the 'relationship dynamic' and run with it. Some guys do the horny guy act. Others will stand there and tell a girl "I like you, I like you." 10 different ways. The idea is to DEMONSTRATE that positive relationship dynamic as if you're already boyfriend/girlfriends. Your FR from a few weeks ago already shows that you can do this. In that instance, you teased, you joked, you challenged, you flirted. . . You demonstrated
attraction. These are all things people who are already in a relationship do with one another.
PU isn't rocket science; plenty guys do well in spite of themselves. . . meaning, they might get laid once in a while but the girls could be thinking, "He's kinda rough around the edges but cute enough," or "Shit, this kid is persistent."
Based on what I read in your FR, I'm guessing that you've probably already experienced better reactions from girls. . . they tell their friends, "I don't know . . . we just click!" "We're meant for each other." "It's as if we knew each other forever." Girls you sleep with for two nights tell all her friends that "you're dating". This is the difference.
Some comments related and unrelated to 'demonstration':
HER: So basically you're familiar with photography and filming?
ME: Yes, and you know . . . You're very fashionable with your clothes.
"Yes" can lead to one of two reactions. 1. He's full of himself. Or 2. OK, he's familiar with photography. Neither reaction raises excitement or interest in the topic. Why not, "I did a few weddings and (glamor shots, sporting events, etc . . ) It's a hobby. . ."
If she's talkative, she asks a million questions. If she's not talkative she goes, "wow".
ME: You pick the colors good and it makes your eyes stand out. It would look REALLY good on picture.
^This is you trying to get her excited by getting excited yourself. A simple, "You'd look great in a _____ (some location?) photo." Whether she goes, "I don't know. No way. Really." - it's all the same isn't it? And when it isn't some sort of 'silly contest", no need to get that excited about it. It's nothing. . . you do photo shoots all the time. She's the one who is excited. . . just happily tell her, "Yeah, pick a Saturday. We'll do it."
I've had cocktail parties in the past but in general, it doesn't make great first date invites. Far better to go out for cocktails. If you want to do it at home. keep a little wet bar with all your cocktail paraphernalia out in plain view.