Heart broken

Hey to whoever is reading this, I lost the love of my life and I want him back. Problem is, he has a new girlfriend. While dating this girl he still hits me up to hang out. He constantly tells me how unhappy he is and how he can see a future but not a happy one with her. I tell him to just break up with her because there’s no point int waisting both of their time. His response is “it’s not fair because she hasn’t done anything wrong”. How can I win him back? Or at least make him see he’s going down a dark path with her?