I don't know that the pain ever does go away. It can lessen, but there will be triggers. Hell, after a wonderful week together, on Friday I went back to total resentment and anger about our situation, then had a snap trigger that night after a wonderful dinner while watching a movie. I kicked over a TV tray, broke it, and threw a glass of wine across the room (white, luckily).
I took the time to read your profile, and given your situation, I sincerely doubt that your feelings of pain and hurt are going to go away soon. There's a lot there to deal with. There's a lot to heal from. And I'm just not certain that this WBF is the person to help you through this, being as it seems that traveling is what he does and what is your biggest trigger.
And I personally, would burn the fricking journal and dance on it's ashes. I wouldn't be able to live with that thing hidden somewhere in a place that I was staying.