my sister dated long time ago a guy, everything was perfect…
he was an extraordinary gentleman, wise, mature, realy the Bashert.
after the same period of dating as u described he stopped everything, and sort of “disappeared” -was hard to reach him on the phone, and almost impossible to set up a date.
[all of the details are only 99% correct -i was pretty much a child back then, so maybe he said the same as in ur story. idk]
she was realy broken…
after some time, she found out somehow, that he wasnt exactly the type who can marry a girl, and all the dating he does -was mostly for fun, and to fill his life with who knows what.
u can imagine how thankful she was to Hashem for saving her…
ur story sounds realy alike…especialy if you say that he is converted -quite weird not to have any sort of relationships prior to being jewish.
tons of Hatzlacha though 🙂
(btw sorry if the English isnt perfect, im from Israel.)