How to get over someone

Hey y'all! I was in a situationship with a guy that I sort of worked with (I'm a nurse, he is a paramedic, stupid of me I know). I was really falling for him, the way we would lay together on the couch and he would play with my hair, the random kisses on the head, everything he did. A couple days ago he messaged me about how he heard about something I said about him at work, told me to handle things, then blocked me on everything without even giving me a chance to reply. I have zero idea what he is even talking about because I don't talk to anyone at work about my personal life and me and him never talked at work. I'm more confused and pissed off than anything and just don't know what to do. How do I even get over this guy if I have to see him at least once a week?