I can sympathize completely. I kind of pushed...Ok, I DID push my ex-wife into getting into the swinging scene, group sex etc etc. It was great right up to the point where she left me for one of the guys she met during the "fun". I have been very fortunate that I finally met a new very sweet sub and we currently live together happily. The ex has been married to that guy for about 10 years now.
I've thought about introducing the current girl friend to play parties and such, but I'm hesitant because of my history.
Hang in there. Another will come along when you least expect it.