So you say you are with a woman, you had sex with her once. You got to be about to have sex with her again and she said no, saying something about love.
Possible reasons:
She did not shower that day.
She did not trim her pussy.
She was on her period.
YOU were smelling, feeling/being weird.
She is falling for you and wanted comfort/reciprocation.
Reason number 843758457, she is an evil genius looking to play games with the men she has already fucked with.
And when i say that the much of the PUA advice is teaching guys to think weird and stupid about relationships i get abuse

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OP, stay chill. Invite her again to your place, see how it goes. If she wants to feel comforted, tell her how you feel: you like her, you started to feel for her, you like this and that for her; concentrate on the things you genuinely like about her. Even if you only like her for the sex, tell her you find her irresistibly attractive and you can barely control yourself when with her (while looking in her eyes with a slight smile).
Stop thinking of "games" is my advice.