Is he actually a cheat?

There was a boy in my highschool back in 2012. He was a very good student and popular. He asked me out through a mutual friend and I said no. Because I was crushing over a playboy. Some of his friends were also my friends and they tried to persuade me over the years. And he also approached me. But there was always something and I didn't like him. But as we grew up we were in touch. We'd chat once in 6 months or something like that. Gradually I stopped being irritated him because he stopped being sarcastic with me and we had a lot to talk about. I enjoyed talking with him but however he never talked about liking me anymore and I was afraid of dating. becaude I had a phase of "I'm never getting married" so dating someone was out of the question. But he dated 3/4 girls over the years. And we were in touch. He is a marine engineer and he'd disappear for months when he's on ship. when he came back he'd always text me. we'd talk about school days friends, our philosophical ideas and so many things. he'd keep texting me till the last moment before he'd lose internet. but he was in a relationship with a girl for a year. Which I found out later.

I never understood his infatuation with me for 10 years. He talked to me even after having a girlfriend. I feel bad for her. I wouldn't like my boyfriend talking to his old flame. Am I a bad person? Did he emotionally cheat?

Is he actually a cheat?
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