I know exactly what you mean. I gamed this girl for a while and I always get the IOIs. But she never returns anything back, well kind of. She sometimes says stuff, that kinda plays to whatever I say to her.
For example, I text her saying, "After playing that game (strawberry field) I think I have an idea of what kind of girl you are, I bet you, you're one of those good girls" (totally opposite, just throwing a bait, for her to bite)
Her reply " I am GOOD, but I can be naughty too

"
Okay, so i was like "she's giving in" But whenever I see her, it's like nothing happened. Straight tripping! In the end, I just gave up because it ain't worth trippin over ONE girl! ya know!