He initiates the conversation but doesn’t ask me questions?

Guys I need your help! So I’ve been talking to this guy for 9 months now and we’ve been on and off. Every single time we text, he’s the one to initiate the conversation and asks me how I’m doing. However, most of the time it ends up with me being left on read. And weeks later, he’ll initiate the conversation again, asking me how I’ve been (with me being afraid he’ll leave me on read again). I’m usually the one asking the probing questions and thinking of topics while he rarely asks me questions to try to keep the conversation going. Guys - can you help me decipher what’s going on here? Girls - has this happened to you before?
He initiates the conversation but doesn’t ask me questions?
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