What the hell is going on??

Alright so about a month ago I caught my man sending nudies to his old high school girlfriend, we fought and broke up obviously, but we live together so it was a rough few weeks.. but last weekend while I was in Iowa with my sisters for a getaway weekend... we talked and they support my choice to give him a second chance (he’s been a serious god send up until this all happened) so I send him a text saying that when I get home we start fresh, we have a clean slate. Oddly enough, to my surprise... we’re doing better than ever. Sex was always an issue before because I never wanted nor desired sex. But since I’ve been back it’s been almost every single night. We’ve been more in tune with each other’s emotions and thoughts. I had my doubts, I still do now and then. I cant help but wonder if this is all too good to be true..