Hi guys,
Do you feel like you are more likely to hook up with a girls when your first introduced because you don't know each other and its exciting. I want to know how you can stimulate this with girls I already know. Like how can I get girls that I am friends with. What I run into is we already know stuff about each other so I cant use things I would on girls that I just meet, so the conversation dies out really quickly. In sum, how can I sexually escalate with girls I know?

if you guys are at a friend level, just change the way you treat them.
be more physical, cocky and display some alpha male qualities.
their perception of you should change quickly.

you are who you're perceived to be, people change as part of life, be who you want to be and peoples perception will change

I don't see how escalating with girls you already know is any different from girls you just met. In fact, you've already gone past the social hook point, but probably not at the point where you can start comfort building because it's unlikely that she sees you as a sexual object. Otherwise she'd already be giving you IOIs. It's likely you see her as a friend but she sees you as an acquaintance, just one of many guys in your overall group of friends.

Just pick the one you like, neg her a little bit to get her juices flowing, turn off the nice guy routine and turn on the alpha. DHV with your other friends in your group, watch for IOIs and then start to escalate. You can also just start with kino but if you come out of nowhere and go from an acquaintance to someone who's touching her, that could be a little weird unless it's very subtle. Maybe build a little physical tension with her with friendly nonsexual touching and test for compliance. Hold out your hands to see if she grabs them. When you go to walk somewhere, extend your elbow to see if she takes it promenade style, etc.

Showering her with attention will be super obvious and also not very useful. Spread the attention around your group. Make sure she sees you take charge of the situation and lead the group somewhere, like getting everyone together to go to dinner (LOM). You're going to need to go back to playful/cocky to rile her up a bit. Playful negs will test her interest. If she takes the bait then she's interested, but keep the cat toy bouncing around in the air for a while. Get an IOI, then neg her playfully, DHV then give her an IOI back. If she's not interested, you may need to up your game a bit (dress a little nicer, mirror her a little, use push/pull rewards, etc). If you step over your bounds and DLV her a little too much, then complement her and build her back up again. The little playful games you're playing with her will get under her skin so hopefully you'll be on her mind long after you've all gone home for the night.