Does She Actually Like You? Vetting a Woman for Real Attraction and Interest

I see a fair amount of social media posts featuring text interactions on dating sites between men and women and the boring, lukewarmness immediately jumps out at me. It annoys me to no avail and I want to shout at these folks through my phone screen:

"Hey man, she's NOT into you!" Obviously I can't do that and hope to make a dent by any means, so I figured I should go in-depth here instead on what men can look for in terms of gauging a woman's sincere attraction level.

The thing with women is, they really can't fake attraction. If they really don't like a guy oftentimes they just refuse to have anything to do with him whether intimately or even friendship-wise.