I don’t know what to do and I’m broken

My partner (well ex, we broke up on Sunday) I love him so much but he’s broken my trust so many times, he’s made promises and then broken them the next day, he’s told me lie after lie. Tomorrow (11/02) would’ve been our 18 months and I’m completely broken without him. I have no way of speaking to him or seeing him because he’s recently been locked up for multiple break and enter cases. I guess I just want someone to reassure me that it’s going to get better, either he’ll have a reality shock and completely change, or that I will be okay