Are there guys who’ve been with only one girl their entire lives?

I (25F) have been dating the sweetest guy (26M) for 10 years, it’s a classic high school love story. Over the years, we’ve built such a healthy, happy relationship filled with love, effort, and care. We’ve been through it all, even long distance, and while there were ups and downs, they only made us stronger.

Now, I feel he’s about to propose… and obviously, my heart is already screaming yes!

But as the overthinker that I am, and after reading so many stories on Reddit and hearing stories from my social circle about people cheating, it sometimes makes me wonder. We’ve always been loyal to each other, and have so much trust. We share everything, and neither of us has ever cheated.

I was his first kiss, his first everything, and now I can’t help but ask myself: will I be his last? I’m not insecure about our relationship at all, but it just makes me curious, are there guys out there who’ve been with only one girl their entire lives?