Definitely won't be doing any of that again lol and never been turned down. What do you suggest I do im terms of gaming her, continue flirting and try to f-close? Or just chill out for a bit?

Hello PUAs, I have been hardcore gaming this girl from school. She has definitely dropped some IOIs. One of her best guy friends who is a pretty good friend of mine aswell told me she wanted a dick pic and told me she will give me stuff in return. I asked her for nudies first and she asked me why I want them. I was growing impatient so I went through with it and sent her a pic. She saw it and asked me why I sent her one. Today, we saw eachother she was with her friend, she made eye contact for a split second the walked off in obvious embarrassment or shyness. Later in the day she opened me saying "Oh my god why did you do that?!" "I didn't even ask for one" in a shocked tone but not serious. I was with my friend and told him to give us a moment so it was just us two. She then said "You know I am talking to someone." Again I kept calm cool and totally ignored and played it off thinking it's a shit test. Then two of her friends came and started talking to her. I wasn't going to stay waiting for her to finish, I signaled my friend and we just walked off in the middle of the convo. It seems so convoluted I know. Is it a lost cause? Should I just move on? If not then what should be my next move? What's really messing me up is she has shown some major IOIs, asks for number, passes compliance tests, let's me touch her hair, gives nicknames, to name a few but everytime I try to take that next step she backs out and asks why. Any advice will be appreciated, thanks.