... how sometimes I create scenerios in my head and my emotions react as though these things did actually happen.
PS,
This is a critical point that I hear often from LBS's after a reconciliation, especially if there's been an OW/M. If you do nothing else for yourself, learn to nip this in the bud.
What I have found works very well for me is this attitude --
1) I have made a conscious decision to trust H2B. This is my decision and no one else's. (I've actually had 1 friend who for all intents and purposes has ended our friendship b/c of this decision.)
2) If H2B chooses to be unfaithful again, then that's about him and has nothing to do with me. This is hard for us LBS's to understand sometimes because we think the reasons WAS's left is because of something we did. Sometimes that's true, but when they come back, and if we've DB'd and learned and applied the lessons, then we have stopped contributing to those reasons. So, if H2B is unfaithful, it's now about him and not me. Irrespective, I am a better person than I was before, thanks to all of the hard lessons I've learned and all of the hard work I've done.
It is what it is, and it's all good so long as it's up to me!