He used to flirt with me, now he ignores me?

There is this guy who used to flirt with me all the time before. But the last days he hasn't been talking to me at all. When he did flirt with me I thought he was kind of annoying and I always pushed him away, in a not mean way. But when he stopped flirting with me, I feel that I really miss him. This guy is really popular and I'm not really By the way.

So my question; Why do you think he is ignoring me? Is he tired of me or do you think he just needed a little "break". I don't know if I should start flirting with him to show him that I liked it even though it might not have seemed that way.
He used to flirt with me, now he ignores me?
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