Do shy or introverted guys ignore girls they like?

I follow my crush on instagram. I've few times reached to him by commenting on his story updates. He has done that too but only couple times months ago.

My question is this. Let's say he does like me and he does think of me a lot. Would there be such a lack of contact? I mean, wouldn't he want to talk to me if he did like me? I guess you could say that I'm reading the fact that he's on instagram , but not messaging me as a sign that I really don't cross his mind that much. Am I being over sensitive and over reacting about this? Do you somewhat ignore girls online that you really like and think about a lot?
Do shy or introverted guys ignore girls they like?
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