I'm new to pua, but I had a similar problem with a girl when I was younger.
Here's how I solved it back then
If she doesn't want to have sex with you, be open about it and tell her that you are ok with it and that you'll just masturbate to internet porn. (Step 1 make her feel the need to reassure her sexual attractiveness)
Start looking at other women sexually, don't overdo it but do it some times when you two are around town.(Step 2 make her feel she might lose you to someone else, that actually does want to have sex with you)
After you completed step #1 and #2, the next time you make out with her, stop in the middle and say:"I feel like you don't want me to be close to you anymore" Then stand up and leave.
Do it on your own risk, I don't know if this does actually work from a scrapbook, but that's basically what I did back then just by the way I felt. And she jumped me a short while after. (In your case it's mind fucking so you might want to consider not doing it)
Best of luck
Bro-Tip: don't take advice from strangers on the internet too serious
