J.M.
So sorry about your husband's condition. I work in health care and have cared for many people with COPD. You're probably already doing most of the following, but my suggestions are:
1) Get a pulmonologist (lung specialist) and keep regular appointments.
2) If he smokes and wants to quit, he should try the new medicine Chantix (helps stop cravings)
3) Home oxygen if needed
4) Pulmonary rehab might help him get stronger physically... and more important, might help him feel/act more independent and able. Contact the Cardinal Hill Rehab Hosp for info about their inpt and outpt programs
5) He sounds depressed. Sometimes meds can help that.
6) This is a hard one but necessary: Have a plan with your husband for his wishes regarding intubation (going on a ventilator). Some people in his condition say, "If I get that sick, just make me comfortable and let me go" while others say "Give the ventilator a try; if I can't come off it after X days then withdraw it" and others say "I want to live no matter what, even if it means staying on a ventilator in a nursing home." The important thing is that he puts some thought into it so you're not stuck with the hardship of choosing for him, if he becomes too sick to choose for himself.
Best wishes. You sound like a very caring person.
J.