TesuqueRed rocks! Tesuque, I've always enjoyed your posts man, good advice.
"Anyway, go find someone else. Back off from her. LJBF her--tell her you're looking for more intimate involvement and you both should LJBF. Be sweet--tell her you feel she'd make a great friend, maybe even just like a sister."
That's solid advice and I think that's the route you're goin to have to go in some way or another. Don't push against push. Let her have her way. Although I have the feeling she's going to try to turn it around on you by accusing you of only wanting sex. Something like "Oh, well then the rest of our relationship doesn't matter if there's no sex? Is that all you care about? Is this some game to you?" I can see it coming. It happened with a virgin that I wound up having sex with.
I would say what Tesuque said to say, then back off from the topic. But stay sexual with her. When you're naked with her, and finger fvcking her, make her cumm G-spot style a few times. Start eating her out....make sure your pants are off. When she's about to cumm from you eating her out...start moving up and kissing her neck. Let your c0ck rub against her wet pvssy. Let her FEEL it on her skin. But if she starts to complain say "what? I'm not going to put it in, relax". Keep rubbing the cack against it. Start fingering her from the same position.
Eventually the thing might start sliding in a little bit. She will reject it, just keep doing it until she does. When she DOES reject you, don't apologize, or make a big deal. Just roll over and fall asleep. Do this few days in a row. ThEN, pick a day. A weekend day. Get a hotel, or have the house to yourself. Tell her a week ahead of time to free her schedule because you have something special lined up for her. Make reservations for dinner (or at least tell her you made a reservation even if it's first come first serve). Bring her flowers. Open her car door. Take her to dinner, keep the conversation light and have some fun. After dinner take a walk somewhere "special". Have a bottle of wine ready when you get home.
Start drinking the wine with her. This is going to be the night, if any. Do the same things that you've done the last 3 or 4 times. She will probably let you in because she's always imagined her first time to be something special and out of the ordinary. If you craft a special day for her, and she's horney enough - then she may have that extra exuse that she needs to be willing to go after something she's wanted all along.