Some girls are just massive attention whores, especially some good looking ones.
They have no intention of doing things with the guys that orbit them, they just LOVE the attention of being WANTED.

If your attention level drops they will flirt with you and rekindle the supply of attention back to them.

Unless you are a total Ninja manipulator you will just get sucked in to a low orbit around her until you burn up into the atmosphere.

In these situations i lay it all on the table ASAP as i do with any girl i find attractive.
leave no doubt in her mind that you want to do rude things to her.

Its better to put it all on the line and crash and burn then walk off into the sunset than be a pussy orbiter for months on end only to end up walking into the sunset feeling and looking like a muppet.

The only stipulation ive found with some girls is that they play the lets be friends card rarely if they think you want a girlfriend/relationship and they only really want to play about and fuck.