Ok, np

You do the freeze-out.. That means that you show much less interest in her. That includes not talking to her anymore, or talking to her just sometimes with showing almost no interest, no texting and if she texts, answer normally, but again, show muuuch less interest then you did before. Then in the meanwhile you do the jealousy plotline-Date other girls and that she sees you with her/them.. But it mustn`t come off as bragging or that you are trying to prove her smth.. She has to see it accidentaly or spontaneous.. Smth like that, you know what you mean. But that shouldn`t be on your mind. Date some other girl, and even if this target is still on your mind, force yourself to date her for a while. That is for 2 reasons-you maybe start liking her more bcs you will forget about your 1st target and 2nd reason is, that you show her that you are not a hung-up..
With this 2 things, you give her some space, she is wondering what is going on, and when she will see you with other girls it will subconsiousely tell her that you wanted her not just a friend and when she "rejected you", she lost you..Bcs you have choises..And also, Every girl, really every girl, feels some jealousy.. And this is all good for you, if you know how to use it the right time for a reframe. You see for yourself what is the best timing to do it, but you have to be careful with this..
Do you want to know more about a reframe? It`s the most important part of this..