Can seeing your ex often bring back the relationship?

My ex and I dated for two years. Broke up because he wanted to see how single life is since we both are still in high school. I feel like I'm doing the right thing, let him be single because when he starts missing me he'll come back. But I feel like since I see him so often and talk a little every day, it'll ruin my chances of being with him. Do you agree? Or do the little talks make him think of me? Note that recently he has Said it's been hard for him since we used to talk all time, he wouldn't be able to fully not talk to me even if he wanted to. Like the not texting and not walking is more kind of forced because we need this space. Also, he seems perfectly fine though. Guys tend to hide emotions or what?