I’m not new to the game but when I get this shit test I always fail. Help?

Girl is following my game, flirting back. At some point she says something like… “but you don’t want anything serious with me, you are just playing”

I tried admitting it without remorse, no work

I tried playfully arrogance by shifting that to her, that she is the one not for anything serious (almost work, but something is missing)

I tried playfully telling a lie (obvious sarcasm) that I’m a good guy and I’m marrying her that night

I tried lying saying of course not.

🤷‍♂️ advice ?