If she's not fucking you, it's over.

In a past relationship I stuck around in spite of rarely getting sex and when I did get laid it felt more like a chore to her instead of pure desire. This is the number one indication that you're squarely in the beta bucks camp.

This doesn't always mean that she's using you for money. It could also be for comfort, for her social status, because she doesn't want to be alone, because you're "good friends", etc. The point is, if she's not fucking you it's just a matter of time before the relationship is over, so the sooner you cut ties the better.

As the saying goes, you can't negotiate desire. I made this mistake too, thinking I could somehow logic my way into sex. She doesn't have a low libido, she's not tired, she doesn't have a headache, she's not too busy, she just doesn't want to fuck YOU. If the right Chad appeared all of as sudden, as her panties get soaked, all those excuses melt away, along with the panties.

Of course there might be the odd time when a gf doesn't want to have sex for legitimate reasons, but if it becomes a habit start planning your exit. She's no longer in love with you and she no longer desires you. There's nothing you can do to change that.