Boyfriend has no interest

We’ve been together a few years he was never really that much into intimacy then it started happening less and less. Since I was pregnant and had baby his had absolutely zero interest I did ask him why his never been into it he blames work or being tired but I didn’t really believe this he then pretty much told me he’d been with so many people before me he just didn’t want to do it anymore. Is anyone else in a relationship like this his perfect in every other way. For context I’m 22 his 29. 🤷🏻‍♀️