My crush is going,now what?

About a group of 10 friends-including me and my crush,which rejected me are going to a zoo. I really don't want to talk to him as it has only been a couple of days since he rejected me-I'm still in heartbreak and I'm thinking I might cry if he says something about the rejection,any suggestions on what I can do,to get over this heartbreak?? and stay away from him?