Mark, listen to Karen. Don't show her this site or your books, those are YOUR tools and are to help YOU.
Don't worry about telling the friends, right now just focus on yourself. You can't control what she does, you can only control you. Keep going to the gym and find stuff to do that makes you happy and starts or continues POSITIVE changes in you.
It helps to read others threads and you can get great advice and ideas from them as well and as Karen said, make some great friends. I don't think I could have kept on in my sitch without the people on this site.
So do what you need to for yourself and be strong.
M:39 H:39 K:S14;D8 T:22yr M:15yrs S:12/28/07 EA/PA 3/14/08 OW preg 11/17/08 born 12/12/08 his ~~~~~~~ Never allow someone to be your priority while allowing yourself to be their option