If she's leaving the phone out, chances are pretty good that there is nothing on it. It's when they hide it that you gotta wonder. I think if you check it in front of her, it's .... something... not sure of the word I want here.... I guess degrading... and for both of you. Check it in a way that preserves your dignity and doesn't poke at her, too.
Do not talk to the mutual female friend about this. First of all, it is not wise for you to lean on a female at this time. I believe it is inappropriate. Second of all, this will be seen by your W as you gathering allies.
Gym is a great idea. Look for a running club or a riding club or some group that does what you like to do. New friends doing what you like to do will be a great distraction and outlet for the new fabulous you. Greek
Me45 H46 T25 M22 S21 & 19 D13 Separated and filed 8/08 Moved home 11/08