Is it normal i really want to have sex with my ex

So me and my ex broke up a few months back and I really, really want to have sex with her. The sex we used to have was amazing and I love her body type. It's got to the point where we are meeting for a night out with friends at Xmas and im really excited incase I can fu*k her! Went to Amsterdam and slept with 2 prostitutes but this didn't change anything lol. I REALY want to fuck her and don't think it will be at all easy to find a girl with a similar body