Dear Tired, big web hugs for you!
No wonder you are overwhelmed and tired, that's a lot of d-days! A lot of betrayal and pain, a lot of grieving is what you have been doing for 2 years.
Have you been to counseling? Has he? What happened on your d-days, did he become an open book, show remorse, take steps to correct. Sometimes things go on because they get swept under the rug and not dealt with from the very beginning.
From what you have written, there are many AP's. I am not a therapist, but I do think after being on this site a lot of years that he may need a sexual addiction evaluation. If he agrees, make sure it is a certified sexual addictions therapist that does the eval and continues with treatment.
Have you ever consulted with an attorney regarding your rights in a divorce?
The limbo you are feeling is from wanting to believe he can change, but he hasn't shown you he is willing to do so.
I agree with the others to read in the healing library, also read posts in Reconciliation and in Divorce and Separation. There are great posts in both to help you see what both sides are like.
In the meantime, do take care of you. Even if your WS won't go, make an appointment for yourself for individual counseling (IC). The benefit for you in sorting through this mish mash with a neutral party will help immensely!
Even under the best of circumstances, the process for getting through this betrayal is going to take 2 to 5 years. Whether you decide to stay in the marriage or leave it, this is the healing curve for most folks.
The best advice I ever got here at SI was watch actions, don't listen to words. Words are easy, but it's when the words and actions match that you will see progress in your husband and also yourself.
Being angry, even at yourself, is a part of the process. Just remember: You didn't cause. You can't change it. You can't cure it. Be observant, be aware, watch what he does, make decisions based on evidence and facts.
You will be okay. You are on one helluva rollercoaster ride emotionally.
Our MC told us not to make any decisions at first regarding the marriage. It was a blessing to hear that I could take the time I needed to make the decision of whether I could continue to live with my husband or not. He and I are still together, but he did things to show me that he wasn't going to cheat again and was remorseful about what had happened. It took a while for me to see those changes without thinking he was a rat bastard f**khead all the time. I had to heal, he had to help me heal and fix himself. It was hard, but we are much better now.