Should I fuck a girl with a boyfriend?

She has been coming onto me pretty hard. It started from light flirting to her flirting pretty hard, constantly being around me and now she DMs me often and texts me often. We def have sexual tension between eachother.

I know its a shitty thing to do and i dont want to but last time i became distant, it literally made her chase after me so avoiding her doesn't help...
Should I fuck a girl with a boyfriend?
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