Glad to hear you were able to connect with the woman at church. That probably feels amazing! But be a good, strong man and let her know that you won't do anything inappropriate while still married, and that you appreciate her friendship nonetheless.
Also, I'd respect your W's privacy and return her journal to her. She may not be comfortable with you reading it.
H 34 W 29 BD 3/12/18 Divorce Busted Spring 19
It is not things that bother us, but the stories we tell ourselves about things.