Should I pretend to have a boyfriend on facebook?

I recently got into contact with my ex. He cheated and left me TWICE. We have kids together. Anyway all my friends on facebook are in relationships and have sickening lovey dovey messages. My ex is the only relationship I ever had . He's moved on . Im stuck still not in a relationship since he ditched us. I feel sorta pathetic. I want to go grab a random hot guys pic and make him my "boyfriend" and post messages back and forth...I know its super duper childish...but atleast ill look like ive moved on and in a relationship.I know he looks at my facebook so i wanna make messages like oooh cant wait to kiss you again etc....should i or not ?