How long do you wait until you say they left you on read?

This guy once answered my texts (I was responding to his text in the first place) after 2 weeks. He literally sent like 10 texts with photos of whatever we were talking about. By that time I've already lost interest in the conversation and just never answered back.

Is that a normal behavior or do you also think it's weird?

How long do you wait until you say they left you on read?
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