I'm lying to my wife about being happy
What makes you so unhappy?
I'm pretty unhappy with my live, I don't like what I do all the time and I hate that I'm not really free.
You should be honest with your partner. It seems wrong to lie about something that big.
I'm not actually lying, I'm just being vague. It's not like she actually cares if I am happy or not.
If she didn't care, you wouldn't have a problem with telling the truth. But you do think she cares and that is why are lying. You will have an easier time working on  your marriage if you were honest.