I agree with John, what we have all been trying to say to you, others in a more harsh way than some, is that if you want this Marriage, you at least have to try a different approach.
What you have been doing so far, hasnt worked. It is difficult to see that when you are "in" the situation, it's easier for us being "outside".
You seem to be ruled by fear. Fear that if you let go, he will too. The question to ask yourself is, if your desire to hold on to this marriage is enough to make it work, if Dan doesnt share it also. xxx K