After d-day, the BS needs to drive their own healing. As the BS, you need to figure out what you want and what you need from your WS. Then you have to ask for what you want and require what you need. You can't heal unless you're willing to dump your WS unless they meet your requirements. You have to risk losing your M to save it.
It's been 7 years, but if you take control of your own healing, you can be happy again, though it may mean dumping your H.
So ... first question: do you really want him? IOW, do you want to spend the rest of your life with him?
Next, what do you need from him? Most of us who have R'ed have demanded real change from our WSes. That almost always means that the WS enters IC with the goal of changing from betrayer to good partner. Committing to changing from betrayer to good partner is, IMO, crucial.
That is: the WS needs to decide that they're fed up with the way they run their life. Another way of saying that is: the WS has to decide to become honest with themselves and with others - no more lies.
An alternative is to decide your life is good as it is. R is a lot of work. You may decide you don't want to do it. Your H may be unwilling to do it. You might then decide not to D but to continue a marriage of convenience. If you do that, make sure you protect yourself financially.
Your life is in large part up to you. What do you want to do? That's an honest question - I don't don't know the answer, and I don't know what's best for you - but you do. If you're not aware of the answer, a good IC can help you figure yourself out.
So, no you'll probably never be happy if you don't change yourself - but happiness is eminently possible if you do change.
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.