...It Was Just One Night...

I never thought I'd be here, confessing something like this. Me and Sarah have been together for five years now, and we both agreed to monogamy...but then there was him. We were just friends before, but one night it all changed...We met up at a bar and had too much to drink...one thing led to another, and suddenly...we were...together. Just the once, I swear...it's not like I didn't love Sarah, or still don't...but that moment...it felt so real, and yet it was all just...a blur now. I can barely bring myself to type this out...what if she ever found out? What would she think of me then? It's been weeks since then, but I feel like every day will be my last. This guilt is eating me alive...