How can I learn to read my wife’s emotions?

My wife and I have been married for 12 years. I have one problem in our marriage. And it is of my doing. I have not yet learned to read my wife’s emotions. Some people can’t sing or aren’t mechanically inclined. I can’t read her emotions. I sometimes have this issue with other people as well. My not being able to read her emotions has me in a constant state of hyper-vigilance. I am constantly asking her if she is ok. I need to know what room in our home she is in at all times so I can brace myself in case she gets frustrated at anything. If she asks me to to something, I assume it needs to be done right now and I rush off to do it.  It usually isn’t something this needs to be done right now. I find myself constantly apologizing to her. I try not to upset her, and I mean not even frustrate her. I also don’t know how to deal with her when she expresses frustration. This helps no one and she is looking at me like I am nuts when this happens. She probably holds back saying things she needs to say to me because she doesn’t want to deal with me. How do I fix this? Is she going to divorce me?