My ex and I broke up 7 months ago after a 3 year long relationship. Our relationship was long distance and we were discussing next steps when he abruptly left me. Later I found out that he started a relationship with someone else 6 months before we broke up. We work together so I have to encounter him from time to time. And I have to see him in person at a work event, in a few weeks, which ironically is the same event where we first started our relationship which will most likely trigger some emotions. He reached out to me yesterday to say he wants to be friends and meet up for a drink while he’s in town. And today he deleted all of our shared photos (which was like a stab in the heart). I know it’s really over between us but I think my heart has been holding on to some false hope that we could reconnect and fix our relationship.  Over the months I have gotten lots of mixed messages from him and I was always hoping he would explain to me why he did what he did. That never happened. So I know I need to move on and I really want to now. That  said, I have struggled with letting go and was wondering if anyone had any advice on that. Also any tips on how to handle seeing him in person. Thank you for taking the time to read this.