If its been almost 6 mths since affair was discovered and his ex mistress asked him how things are going at home and he says ehh its going when he said the same thing 5 mths ago whats that mean?

Man still has ambivalent feelings about his marriage, loss of mistress or both. If he is staying in his mariiage because it's just a place to be right now, suggest marriage counseling , and if he refuses, suggest trial separation so he isn't just using the wife as a safe have til something better comes along.