Law School Secret Confession

I’m a first-year law student married for five years now. Don’t get me wrong, I love my husband more than anything, but there’s this side of me that craves something different. Last week, during one of those late-night study sessions in the library, I met Sarah, another law student who's as passionate about our field as I am. We hit it off instantly and ended up talking long after everyone else had left. There was an undeniable chemistry between us, and before we knew it, we were exploring each other’s bodies behind a locked door deep into the night. It felt like everything I’d ever wanted but never dared to admit existed. Since then, I’ve been sneaking out for these secret rendezvous whenever I can, always on campus where there are excuses. Yet, here I am, paralyzed by guilt and fear of what this means for my marriage. Is this normal? Am I cheating in a way that will eventually destroy everything I love? What should I do?