What to do when you see your ex daily... URGENT PLEASE?

My boyfriend and I broke up about three days ago. I don't feel absolutely devastated because I knew it was coming but my feelings are hurt. When my ex told me we were going to break up I told him for four specific things: I wanted my space, didn't want to be friends, didn't want any drama, and no contact. Today he broke the rules. As most of you may know it is Valentine's Day so I was kind of emotional already. At lunch I always sit with my friends and some of my friends are friends of his. So he walks into the lunch room and decides to come sit down right next to me. He tries making an effort to talk to me and I try my best to be civil. My friend offers to move and I immediately take her offer. Now the way I usually get over someone is the out of sight, out of mind technique. I don't want to get back together with him but I want to get over him. Should I speak to him about this conflict?