Has this only started since you started taking antidepressants? Some of them can cause a flat affect. Sounds like couples counseling might help with you and your husband. I don't know if this started before or after the antidepressants but it couldn't hurt either way.
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Bipolar I, Depression, GAD Meds: Zoloft, Zyprexa, Ritalin
"Each morning we are born again. What we do today is what matters most." -Buddha