So usually I meet few girls in socialising events and other places. We casually exchange numbers or Instagram and text on WhatsApp/Instagram for my stories or some other context. Everything goes well, quick replies, quirky, flirtatious messages and all but when I say "let's catchup sometime", all of a sudden the message is delivered but they don't see it. Usual messages get reply in few minutes but this one doesn't even get seen, even after days, weeks. I have observed this pattern in many girls now. I'm bit confused here. If they are not interested, they could have just not shown any enthusiasm in the beginning, or even for quirky messages or memes. But why does this enthusiasm disappears? That too when I ask to meet, not so soon too. What am I doing wrong here?