am i cheating?

Until now, I still like to stalk my ex. There's nothing wrong with it, just want to know how he's doing now. It's just fun to see their life. My husband doesn't know... Actually, my marriage is fine. But for some reason, I'm still drawn to my ex. Sometimes we call each other when I'm not at home. There's nothing weird in our conversations, just sharing stories and encouraging each other. Am I cheating?