This may seem off topic and not-so-mature, but **CHicKLit, **is your husband an Aquarian?
On a serious note: Some people (both, male and female) are naturally aloof because they don't want any sort of emotional dependency with their spouse (weird, but happens), whereas with friends they can just have fun without worrying too much about these things. YES, it does seem irrational, but I have seen in happen a couple of times.
He maybe acting aloof because he might be re-evaluating some issues that he is not ready to share, or simply doesn't want to (yes, men do that, macho-ness and what not). Sometimes distance increase, as crazy as it may sound, when a couple has not had seen eachother through really bad times (mistakes, fights, irrational requests) and when they are very cautious with eachother. It just makes a relationship very formal and boring, and I feel this is what's happening here.
I remember you mentioned somewhere that neither of you like to raise you voices, which is ofcourse a good thing, but 10 years into a marriage and still such reservations?? Maybe you guys needs to loosen up a bit.
Honestly, a very sensible post. You've pointed out something that goes unnoticed many many times - when couples are so formal because of 'reservations' and can't be themselves, it leads to this internal suffocation. So, so damaging for the woman, and I'm sure the man too.
Chicklit, just yell and scream sometimes, shake him up, expose your less attractive emotional side and things will hopefully get better.
This Aquarius thing, darn!