My reco is to separate healing from the D/R decision.
Whether you D, R, or wait, you are the only one who can heal you. Your partner can help or hinder you (or play no part), but you choose the amount of healing you do. I hope SI helps you choose to do a lot of healing - the more you heal, the better your resolution will be.
Both R & D are full of pain. If you focus on healing, you will be able to bear the pain better than if you focus on the D/R decision. If you choose R while healing yourself, you will be able to handle both successful and false R.
Healing means, IMO, processing your anger, grief, fear, shame, etc. out of your body. That's harder to do than it looks because the trauma of being betrayed will trigger memories of every other trauma you've experienced, and you'll have to deal with those traumas, too. The thing is: the payoff of releasing pain is worth the effort.
At the same time, you'll do yourself a great service by not buying into your WS's pain. Your WS wants you to fix them - but like you, they're the only one who can change themself from cheater to good partner. Your H may be addicted to sex. If so, my heart goes out to him (and you) - but he's the only one who can manage himself. No one else controls him.
You describe yourself as a normal BS - at a month out, most of us don't know which wat is up. Understand that, accept that, and have faith in yourself to get grounded again. It will happen - probably within 3-6 months from d-day. I know that seems too long - but you've probably got several decades of life left. Believe me, a few months will seem like a very brief period in a few years. Now doesn't look like a good time to act. At some point in the not so distant future, you WILL know what you want and what is possible. That's the time to act.
fBH (me) - on d-day: 66, Married 43, together 45, same sex ap
DDay - 12/22/2010
Recover'd and R'ed
You don't have to like your boundaries. You just have to set and enforce them.