What seems to have worked with JWS and I is to validate the s's feelings and swallow our own pride a bit. Get an empathy with them and that way they feel as if they aren't fighting you and let their guard down a little. So, for me saying that I'll sell the house was very difficult but my h appreciated me saying I would sell it and felt empathy for me. If I had said no, he would have gone away feeling angry and that wall would still be up. At least now there is a chip...
I kind of feel the same about fb and myspace. I do feel like they helped build a wedge between my h and I. Revisiting the past is not always a good thing, it is past for a reason and now it means I can snoop (I do everyday, even though nothing ever happens on my h's page). It was how I found out about ow woman and in a way I wish I hadn't as I only have half the information and it really has just left me paranoid when there is a probable 80% chance nothing has ever happened!
Take this time before your h comes back to work out how you can respond in the best ways to the probable topics of conversations that may come up, that way you are prepared. We can always work it out together if you need a sounding board, it's what we're here for. GAL this week by doing stuff for yourself, get pampered so you look gorgeous when you see him. It will make you feel so much better too.