You must be getting something out of this relationship, because otherwise you wouldn't be in it.

Instead of "venting" to your therapist, why aren't you working on how to make your life better for YOURSELF and how to create a life where your needs are met in a relationship? Meaning how to extricate yourself from this situation and work on yourself so next time you can find a partner who will give you what you need instead of what you have now, which is nothing? Your wife has clearly said she isn't going to give you what you want. Do you live the rest of your life like this or do you take some action.