I broke down in front of my ex today. What do I do?

My friends and I meet in the same place every morning and he never comes to talk to us but today he did. He was talking to my friends but completely ignored me but showed off as much as he could and made sure I was watching and listening. I was trying so hard not to cry, but once one of my friends came I just walked over to her and broke down.We were walking to the bathroom and he looked over and from what I could see since my eyes were watery, he looked over and saw me bawling. He's gonna be at prom with another girl and they guy I wanted to come can't make it. I can't take it anymore. I miss him too much. Someone please help me. WHAT DO I DO!? Does he think I'm weak now!?
I broke down in front of my ex today. What do I do?
Post Opinion