You might try to agree on some ground rules to give her the space she is asking for - whether it be separation or "in-house". You have to get into a place where you are not pursuing her or being retaliatory - both are counter-productive right now. You can show your love by being respectful and supportive. The guilt trip isn't going to work for you. If she will agree to "dates" then you have some time together without any demands, expectations or pressure.
It would be a very bad idea to talk to her friend's wife. You just have to detach and work on you. Maybe you could get out and do your own activities - if you are interested in skiing, shows, etc, then go on your own.
me: 47 H: 48 he has 2 grown sons M 1995(my 1st, his 3rd) hit iceberg 6/07 S 9/26/07 before now