They met first on WP and have since met IRL.
I have no idea about "love", but it's clear they're getting on very well and greatly enjoy each other's company.
The teasing humour (aka "banter") is utterly unique and personally speaking, very funny - although I do appreciate that banter may be taken a little too literally by those not participating in it. Banter is only workable between people having a good understanding and acceptance of each other, and done with much affection.
Maybe banter is more of a UK speciality but as a rough guide - if it sometimes looks like what's being said is insulting/demeaning/aggressive, then it's being mis-read.
Banter is never these things - and therein lies the art of it.
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Giraffe: a ruminant with a view.