The biggest thing that stuck out to me is the no sex in 6 months. Being turned away (yes I understand she was intoxivated) is really devestating to a woman. Lack of intimacy really made me feel unwanted, unattractive and rejected, probably the same way your wife feels. It is so easy to let "life" get in the way and it doesn't take long to let the situation get out of control. Give your wife some time to get thru the test, let her know that you would like to talk and figure out what your needs are, think of what can be changed, go to counseling for your depression. Depression is the root of a lot of divorces, IMO. Start taking care of yourself, she will will be more receptive to a healthy, happy man opposed to a depressed man.
BTW, you are a great writer, keep it up, it may be very healthy for you to continue venting.