Is he stalking me on whatsapp?

So I stalk this guy friend of mine on whatsapp, and what I notice is that till the time I am online, he's also online, and when I go offline for a few seconds and check again, then he'll be offline, and then again he'll come online, and the moment I go offline for a few seconds and check again, he'll also be offline, and this has not happened once or twice, this has happened many a times.. Is he really stalking me?
Is he stalking me on whatsapp?
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