Hi Needadrink, boy, I bet you do.
I'm so sorry you find yourself in need of a site like this, but it's the best place to be for support and advice under the circumstances.
Honey, 18 years.... that's seems like more than an EA to me, it's a lifestyle. As they have been together on occasions during that time, I'm assuming that it was a PA (physical affair) too.
One very important thing to remember is this... none of this is your fault in any way, shape, or form. His A is 100% on him. Regardless of the state of the marriage, regardless of circumstances, regardless of separation for employment, nothing gives him the option of having an affair, absolutely nothing.
Unfortunately, a very large part of having an A is deception and lies. If he owned up to being together with her 8 times, be prepared for the fact that it was probably many more than that. The WS will often only own up to a lesser degree of the truth, under the guise of "not wanting to hurt you further", but be assured, in reality, they don't want to cope with you being hurt more. Not the same thing at all.
Has he attempted to give you a "why"? Why he thought a life like this was a good idea, why he thought he was entitled to make a decision like this, that affected your life and that of your children? Make no mistake, his actions will have affected your marriage for the duration of his affair, and of course, your future as well. Living a life as he has, he has to have had thoughts of her when with you, thoughts of you when with her, unless he is a master of compartmentalization, as many WS are. And that in itself is another form of crazy making, hard to get your head around.
Do you know this OW? Does she live where you do, or was it all conducted with the supposed safety of distance, overseas?
Are you able to contact her BS?
As for the roller coaster, unfortunately, there isn't any way to get off until it slows down enough that you can cope without noticing the dips and peaks quite so much.
Time is your friend.
There are so many people on this site that can offer you support. There's almost always someone around, regardless of the time of day or night, one of the advantages of being a global community. Please lean on the collective wisdom here, many here will have walked either the same path, or a very similar one to that which you now find yourself on.
Make sure you take care of yourself, eat, drink plenty of water, sleep... don't be afraid to ask your Dr for a little help if anxiety or insomnia take control. Try and get out of the house and do something you enjoy, try and find a little beauty in your days.
This is a journey that I wouldn't wish on anyone, but one thing I can guarantee you is that you will feel better than you do right now, promise, it just takes time.
There really are a lot of similarities between your story and mine, if you would like to PM me, I'd be happy to chat. Hugs honey, lots of hugs.
[This message edited by hard_yards at 6:50 AM, September 1st (Sunday)]