Why most people suck at being honest?

I asked so many girls if they want to get to know each other, and after they accept, they start ignoring or blocking you without saying a word or just seen your message
They don't always engage to ignore after they accept to get to know each other, but let's say after 30 minutes or so
Update: I could chat with some and the chats are pretty decent and fun, i just can't figure out what's their issue
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