If you really were such a fantastic lover she would want to fuck your brains out 24/7. She's lying and looking for a reason to get out of your relationship. If she tells you you're great in bed she's lying

Sex with her is more important to you than sex with you is to her.

This is the sign that your relationship is well into the decay state. Like everything in nature, relationships begin, thrive, plateau, decay, and die.

To keep this short, don't be the idiot who stays on a sinking ship trying to patch it up. Go for the lifeboat, and head to the port where there are more, nicer ships that you can work on boarding

If your the best she's ever had, then she shouldn't mind the sex. She's just finding excuses to break up with you. If she is actually in love with you, then if you broke up with her, cut connections, then come back into her life, then she'll definitely show different reactions.

Have you actually listen to what your gf is telling you? Because if you did then you would see what she is saying let alone telling you. Which is she wants the relationship to be more than just sex. I doubt there is anything else going on. It sounds like to me that the "honeymoon" phase of the relationship is over and she looking at the long term.

Don't give her sex for a month, even if she wants it.

Then start seducing her but don't ever push for it again. She becomes slightly hesitant, and you move back.

You rather live the rest of your relationship in a situation like this, or sacrifice some time off that might help your current situation drastically?

It's up to you.

Making up excuses for not taking action is your own doing and not a physical hindrance.

I understand what you mean. But why is there a rule that says the honeymoon phase has to end? Is it impossible for a couple to live a "honeymoon lifestyle?"