In general you need to escalate more, my basic program is tease to get the social comfort and get a little attraction going, then qualify and tease untill I get to comfort, once I'm in comfort I'm looking for any and every oppertunity to escalate to a kiss and then sexually as fast as possible. If you spend to much time in comfort you get stuck in the friend zone.
Now with this girl you need to man up and tell her you are interested in her intimately, and she still may want to keep you in the FZ, and just roll with it, but then from that point you just keep letting her know that you are attracted to her, but game other girls in front of her, she will see that you are wanted by other women and it more then likely will make her want to re think the friend zone thing

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