If he's so eager to talk why doesn't he initiate?

I am unsure if he's interested romantically - but he is at least VERY enthusiastic for a conversation in text, good enough for now. If I text him in the evening we text and joke around through the night. He asks me questions about me often. This is all coming from a introverted guy who likes his alone time.

But while he used to do lots of the initiating before - now we can go days and he won't initiate and eventually I give in and text him - again he's always eager to talk. So whats the deal? If he likes talking why not start talking to me himself? Am I missing something?
If he's so eager to talk why doesn't he initiate?
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