Hroark... Hello. I'm married to a woman who is very similar. It is a very empty hollow feeling to be in an intimate relationship with a person like this. I feel your pain.

A few initial thoughts: Your wife may have a classic stoic personality. The latter is inherent in, for example, many of individuals of Germanic, Scandinavian, or Norwegian ancestry. Or she may have "schizoid personality style" of moderate severity. I say this because a pure schizoid (full Schizoid Personality Disorder) is a total and complete loner and has little to zero desire for any intimate relationships. Or your wife may have mild Asperger's (be an "Aspie"). It's hard to tell for sure. Differential diagnosis for individuals like this can be difficult even for a clinical psychologist.

Question: Has your wife ever seen or been evaluated by a psychologists?

Lastly, unlike trippen2.0 above, I have some insight into whyyou may have been attracted to such a stoic person. There are several explanations. More on that next time.