Is my ex a narcissist?

Imma make this sweet and short. But I commented on my best friend’s picture. And then my “ex” started following me after 4 months of not speaking. The reason he liked her picture was to find me. And he started commenting on my posts, liking them, looking at my story 10 seconds after I post. He even texted me. I found it weird how he thought we were cool. Then I removed him off my followers list and I unfollowed him. Now I see him commenting on my other friend’s pictures. I don’t feel comfortable liking their pictures anymore because I don’t want him to follow me. If anything I want him away from me.
Is my ex a narcissist?
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