Okay, since you asked for a 2x4, you are going to get one.
Three years? You are still holding out hope one day she's going to wake up and feel like being all intimate the way she has not been in years? (And then you won't have to feel resentful and angry because she gives you zero intimacy and affection, because on this day she will wake up and just be a different person, the person you want her to be).
You want her to "help you heal?" Even in the best of situations with an extremely remorseful spouse, I believe that most of the healing actually has to be done by the person him/herself. I R'd with my current H and D'ed my XH. I feel I healed quickly, compared to most, in both situations, but it had to do with my own attitude and actions, not what they did. What they did just made my decision to either R or D easier. (Current H was/is remorseful, XH was not nearly remorseful enough nor did I have reason to believe he would not do it again).
You can't depend on somebody outside yourself to heal you.
If you stay married to her, part of your healing is going to mean what Gonnabe2016 said:
1) mind-wipe all that has *come before* and start anew;
Your WW says your anger and bringing up the A have something to do with HER attitude and she could be right. This is not defending her but she knows deep down she is not going to "change" and is who she is, and if you don't love her cold, unaffectionate, unremorseful self, just the way she is, then you are angry and never going to get over it...so the state of your M is yes, partly or even mostly your fault, in her eyes. Does that sound like somebody who is going to decide in the near future that she needs to "Help you heal?"
Here is the worst 2x4 of all. I think many here want to say "that's okay, cry as much as you want, for as long as you want." But in front of her, I would think that is going to appear desperate and pathetic after three years. Desperation is not often really an appealing quality to an unremorseful WW like your wife.
I'm really not usually a huge fan of the 180 and think it is highly overprescribed on this forum, but it sounds like you might benefit from at least some of the concepts from it. You need to show her a strong front, not a weak front. You need to show her that you are just fine and that you have a life (and friends) with or without her. More importantly, you have to work on making that a reality for yourself, not just a show.
I'm actually saying yes it is time for you to move forward. And really your choices in this are exactly as Gonnabe said, either convince yourself nothing is wrong in the M, and do your best to just be the same H you were to her before you knew about the A, or starting making preparations to end this M. Either way, it is past time for you to realize she is not going to change and "help you heal."
And you are not likely going to change to see her as "just fine" the way she is, either so you are at an impass. You can't change anybody but yourself. And you don't like the changes you must make nor does it seem that you are accepting the two choices that you have. You are still holding out hope for something that I do see as very close to impossible. I have seen plenty settle for a M like yours and move on from there, finding other interests in life to make life more bearable, and that is a choice you have, but not the one I would make. Still it is up to you.