Need some advice

Long story short, my now ex and I just recently broke up after 3 years. He decided he wasn't happy on Monday. We still live together just different rooms now and I've been trying to stay busy to give him some time. Last night we talked and he told me that yesterday he was actually happy and had a good day. Well I've been miserable, and I still have that hope that he'll wanna try again after some time apart. And he seems to be moving on just fine. I know I haven't given it any time but what he said hurt really bad and my optimist brain just keeps wanting to think there is a chance. I guess I wanna know if I should just move on or if people really do just need time apart sometimes to make things work?