Old flame

So I recently started talking to a guy from my past. We haven’t talked in like 7 years, but out of the blue I liked a photo of his on fb and now we recently started talking back and forth on Snapchat. It’s gotten somewhat flirty, as you could probably expect. We do have a sexual history, although we have never actually had sex. I guess I always felt like we sort of had unfinished business and that we would have hooked up at some point, but now both of us are in long term relationships.

I honestly am happy in my relationship currently and I don’t want to pursue a relationship with this old flame, but I’ve been having sexual fantasies about him and I’m just wondering if other people have gone down this road before and would want to share their story. I guess I feel kind of guilty, which is why I’m writing about this, but nothing has happened other than talking at this point. Just curious to hear other people’s thoughts about fantasizing about other people when you’re in a committed relationship.