I would have to agree with the others, I would think that things have gone to physical, I am sorry to say. What jumped out at me was your H registering on a swingers site, my h did the same thing, and I thought it was for us(not that I am remotely interested) but now I think about it, i don't believe it was, it was for them.
Be prepared for the roller coaster, because thats what it will be for awhile, he will go back and forth, and he will rewrite your entire history in order to feel better about what he is doing. Just let things go in one ear and out the other as much as possible, and try to stop snooping, because all it will do is hurt you more!
Me - 44 H - 44 M - 19yrs together - 23yrs D16 S8 EA/PA - Bomb Oct20/06 Jan 8/07 Feb 01/07 Jul 15/07 H still @ home Recovered!