1. Never burn, block or delete an attractive woman. They are very useful to have around and know in a world of 60% OW women. Caught feelings? She was using you? Grow up and realize that everyone is always using everyone and forget your feelings. If you asked my grandfather about his "feelings" he'd say "I feel pretty good today." If you pressed him, he'd look at you funny.
2. Use her. Take her out every night and use her to wing for you. Never go out alone when you have a choice of having a good looking female friend with you. Never. She has fun getting orbiter stuff from you, you have a massively increased SMV while with any good looking woman.
3. Sex ultimatums are cringeworthy, thirsty and whiny. You are getting some bad advice. It -may- work, but many other things will work better if she has any attraction. The way women are guarded, she may have lots of hidden attraction for you, that will evaporate with a sex ultimatum even if she complies. It appears she did/does have attraction because she has handled your d-ck in the past. That means this is NOT the textbook orbiter story.
4. Take her out and force her to wing for you without stating that overtly. Flirt with every hottie you see and introduce her. Playfully ask for threesomes or ask "do you like guys, girls or both?" to women you encounter. You may be surprised at the results and end up in a better adventure than you could imagine. When a woman who has ever handled your d-ck sees attractive women responding to you, her attraction elevates guaranteed. You can't lose, either she pays off as a good wing/preselector and you meet other women while removing your oneitis, or she gets wet watching you charm other women. You can't lose. I have used this many times over the years. Treat good looking female friends like GOLD while dating and seeking other women because they are.
5. Use her more than she uses you. All relations between men and women are transactional anyway. You can both win at this in several ways if you play it smart and grow up from hurty hurty feelings.
But tldr, NEVER block or delete a good looking woman, USE them like they use you. They are of far more use while dating than for sex alone.