I'm new here too, but your sitch sounds similar to mine! I've done ALOT of reading on this site and you should really check out the "setting them free" link.
One thing that I have learned on here is that if you truly want your M to work YOU have to do it. Especially when they are "in love" with the OP. I know it's hard...believe me! My H has already left our home and is actively engaging in the A with the OW.
If I could give you any advice, it would be to be the best YOU that you can be. What were your contributions to the M breakdown? What do you think you could do to change so that they WANT to stay married to you?? These are hard questions, but in the end you have to be willing to do whatever you can to make it work.
Some of the vets on here will give you better advice and they'll be along shortly! Check out Country Song's posts...they have really given me alot of insight!
Me: 31 H: 30 Kids: D9 Together almost 12 years Married almost 5 years EA began: 8/10 Separated: 3/11