Need advice badly please?

My Ex boyfriend and I were on facebook chatting and he was calling me names so I called him some back (jokingly) and he ended up calling me a sexy *****.... and then he said, "id shift ur face u sexy *****" Shift means kiss, snog, make-out...ect. He asked if I'd kiss him back and I said I dunno. What's he doing...he's my ex.. is he joking or serious..I'm lost.