If I realized one thing about game, it is that you cannot keep high caliber girls without fucking them. If you get to the point where you are intimately kissing a girl, you must go to the next step. So many times have hot girls lost interest in me because I didn't do this. Having sex with a girl proves you are a viable man capable of taking the next step. There have been moments where I have literally brought girls into my room, and I have been clueless enough to just talk to her without doing anything further. It is obvious why girls ghost me after instances like this.

IF A GIRL IS SEXUALLY INTERESTED IN YOU, SHE EXPECTS YOU TO FUCK HER! Never make a girl wet and horny for you and then bail on her. She will be happy to go with another guy who will fuck her.

Everything in game should be geared towards getting the girl in your bed. It isn't until after this that things can develop into a relationship. This is because girls want sex more than you think. They don't want prince charming who gives them flowers and nice compliments. They want a bad boy who is confident, dominant, sexual, and throws her into his bed. They want a guy who is fun, adventurous, and leads. From the girl's perspective, you are taking her on an adventure. You must lead her. She is expecting you to lead. And if you are insecure about making any advances then she will notice and loose interest quite quickly. You must be confident in leading and advancing with a girl. Obviously calibration and social awareness is important as well (because you don't want to make the girl uncomfortable), but 90% of the time guys overthink this. Your main priority should be leading and advancing.