I feel the need to see if I need my WW.
We need food water, some shelter. We're healthier if we connect with other people. I don't think it's healthy for an adult to need a specific person, though. A relationship is probably stronger when it's based on want rather than need.
I love her but what she did was disgusting and may be a deal breaker.
Would you say the same thing about your cheating?
Some may say “ just leave her”. I get that but after 28 years I need to know if that is the right thing to do.
It's definitely a right thing to do. What keeps you from accepting that?
Being loyal for so long has left me wondering what I’m in is my relationship a fraud?
I don;t get that. Did you expect that your fidelity would guarantee your W's?
What I feel is a good relationship actually not good?
You get to define what you want in a relationship. If you're getting what you want, doesn't that mean the relationship was good?
Now you know you've been betrayed. You have a simple choice to make: (re)build the relationship into one that you want or leave. Both are OK choices.
I feel the need to separate and date other women to find out.
Is it OK for your W to date other people?
Personally, I think one is either M or not, and if one is M, that means dating no one but one's spouse. You are free to negotiate a different type of M, though.
*****
The thoughts that you have expressed make me wonder if you're in the throes of 'post-infidelity' trauma or if you really don't want to be M to your W.
Are you in IC with a competent C? A good IC can help you a lot. So far, I think you've been doing long-term damage to yourself.
I know, I know. You'll want to defend, but there's no need. I have my opinion, and you have yours. Only time will tell who is right.