I am truly sorry for you! I can relate a bit, as something similiar happend to me and a girl I once knew, although I'm currently a JW for family reasons. She was just attending meetings because her family went, but in the beginning she never believed any of it. We hung out a lot and we "dated" (in the JW sense) for a about half a year.
Then, she became a non-baptized publisher which is a fancy way of saying a person who knocks on doors and gives the mags to people without being an official member. Then, she went to New York to visit bethel for a week and came back a different person. She said if I didnt return to jehovah then I would die in armaggeddon!She got baptized later that year and I havent spoken to her since.
As to your question, (is it that easy to discard wordly's?) the sad truth is yes, it is. Once they have been indoctrinated, or in his case re-indoctrinated and return, they are mentally manipulated to just suddenly cut you off, w/out feeling bad or regret about it because in their eyes they've done the right thing for jehovah. It's just wrong on so many levels.
It's sad to watch the one you loved turn into something they are not and It's downright depressing when they go back to a religion that is so twisted and messed up. If you fell in love with him, it was 100% in. But to a JW, especially those who are out but looking to get back in, they can only ever be half in love with a "worldy". According to their beliefs, worldy people will be destroyed by god at armageddon, so they dont even really truly care about them. I do wonder if he ever confessed to having you as a girlfriend to the elders, or better yet, that you two had sex.
Your story is a cruel reminder of just how important it is to not get emotionally involved with jehovahs witnesses. I know that it will be difficult for you, but just hang in there. It will get better. It just takes time.
I'll PM you if you need someone to talk to, like you said it can be a bit embarrassing to talk to others about this.
OneDayillBeFree
Oh and welcome to the forum!