Why would a dating app talk to me for so long but not make concrete plans to meet?

We’ve been talking since before lockdown and over the last week he’s vaguely suggested meeting soon and told me he’s very excited to meet me. But he still takes ages to reply. Is it all doom and gloom or could it be a fear of meeting because of lockdown even though it’s now eased here?
Why would a dating app talk to me for so long but not make concrete plans to meet?
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