I’m so lost

I’ve wanted my husband to treat me right for soooo long almost 12 years I’ve begged him to stop talking to other females and to stop disrespecting our marriage. Finally I had enough and told him I wanted a divorce which wasn’t the first time I’ve pulled that card but this time I was serious. I was looking for a place to stay and applied to jobs for extra income. I was so set on getting out even now I’m not sure what I want. Anyways during all this I started talking to a guy for about a week and my husband decided to snoop through my phone and found out and went crazy called me a whore and even took my phone because he does pay the bill. Later he came back and apologized but I told him I still want a divorce and I do not want to be with that guy but I’m not happy anymore. All of a sudden he’s changed and wants to make things right. He’s swore he’s changed and he will never do wrong again. He’s cut back on his hours at work because he use to work crazy long hours and seemed to never be home. He’s cut all social media out and seems to be trying really hard to change and even been seeing a therapist/counselor about our marriage. I’m not sure if he’s really trying to change or if it’s put on but I don’t feel a thing. I don’t even feel sorry for talking to someone else because he’s put me through so much worse…it didn’t even bother me that it hurt him when he found out. I just feel numb about us. I don’t feel happy or sad..when I think about us divorced and him moving on it doesn’t even bother me. Should I really stay or it’s finally time to move on??