I'm sorry he made you feel bad and laughed at you for your suggestions. That's not right and not acting like an adult either.
It can take a toll on a marriage if one partner is acting like they've already 'left' the relationship, at least the itmacy or emotional part. I think marriage can survive without the physical aspect of sex, but not without some form of intamacy (this can mean an emotional connection also.)
Have you tried talking to your husband, and even if it's hard asking him "If he's happy with the way things are in your relationship?"