Why doesn't he answer when I ask how he's doing?

So the guy I am seeing acts very strange from time to time. Let's say I text him to say Hi! and ask what he's up to. I don't hear from him for 5 or more hours. When he finally responds, he will ask what I'm doing or where I am or he sends me a meme or a link. However, he won't tell me what he's doing.

What is going on?

Why doesn't he answer when I ask how he's doing?
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