My H and I had about 5 mos of false R. A lot of trickle truth, blame shifting, lying and a ton of hurtful things said by him, me and the ow.
When we finally did get to a place of true R, once I felt our marriage had stabalized, I had to deal with the effects of all of those things, they can't be undone.
I had to take each thing one at a time and sort it out, writing a journal about my feelings and working thru them, talking to an IC, talking to my H and sometimes deciding to let it go were all things I had to do.
So Q1. You never know if the affair will resume, will he be faithful forever? I have decided that I will never blind trust again, it can't happen. So as long as my H is open and transparent then I trust my gut. I also don't brush things off, if I ever get a funny feeling, I dig it out, before I made excuses "he's working so hard, he's tried, he's blah" no more, if things feel weird I talk it out until it is explained.
Q1 part 2 did he settle for you? I think this is a trust actions thing. If he is doing everything you need to feel safe and loved you need to choose to accept that or not, questioning his actions constantly will drive you mad. If you are truly having gut feelings something isn't true thats one thing, but doing lots of 'what ifs' isn't helping to repair your relationship.
Q2- you are at a disadvantage for being in a different state but it's not your fault, you guys are trying to work it out. If you are feeling guilty I'd look deeper into that either on your own or with an IC. Have you chosen to stay distant physically for some reason other than job? Do you have past issues with being hurt? Maybe this is a bigger issue, maybe it's not but the fact that you feel guilty suggests further investigation imo.
Q3-The OW is tough to deal with b/c you typically can't work thru stuff with them and you shouldn't in most cases so resentment can really linger.
I few things to remember about any OW, their self esteem is pretty low generally. If you're willing to be someones seconds, if you're willing to be hidden and someone the person you love won't leave their s/gf to actually be with you and you still continue to sleep with them, well you don't think very highly of yourself. She was lashing out to try to bolster her sudden realization that she sort of trashy. So take what she says with a grain of salt. If think something she said is true and your bf is lying about it, I'd suggest writing all the facts you know out in a journal and try to sort out what the truth could actually be and present it to your bf for clarification. If you're just letting ow get under your skin, unfortunately that is something many of us just have to figure out how to let go of. I thought of every possible way to handle my issues with ow, confronting would just make it worse, even if she apologzied it would take back what she said or did and I wouldn't believe her anyway. so what was i left with. I talked it out like mad with my IC and i ended up doing a symbolic "letting go" ceremony which actually was helpful.
So as i mentioned, it's really about taking every single issue one day at a time and working thru it, otherwise all those little things eat away at you. don't be tempted to just sweep em under the rug, they won't go away on their own. But you can get thru it, it seems daunting but once your thru you'll be glad you did the work. Makes the relationship so much more valuable b/c you both put in so much work to make it right.