j960,
You are in a difficult situation and are a wonderful wife for seeking help for your husband!
Your husband's response to his incontinence does not fit within the common range of emotional reactions. So-called "normal" reactions include anger, denial, anxiety, stress, loneliness, and depression. Feelings of anxiety and generalized depression are very common reactions.
I am double incontinent, that is, both bowel and bladder incontinence. As have all of the members in this group, I have suffered through a range of emotions. However, your husband's reaction seems extreme. Having been an AB/DL does not account for his current emotions. It would be prudent to seek professional counseling.
You may wish to tactfully mention to your husband that, despite his AB/DL leanings, wearing adult diapers for incontinence is not childish. Refusing to be adult about dealing with the problem is.
As greenback has noted, becoming involved in positive experiences can be a great help in fighting anxiety and depression.
Similarly, avoid negative or "toxic" situations or people.
Below I am listing some common tips in fighting depression:
Daily exercise is important in fighting depression, despite the annoyance than wearing diapers can cause.
Become involved in something you find interesting that you find creative or artistic.
Don't allow yourself to become socially isolated. Stay involved with friends, church, interest groups, etc. Stay involved with activities outside the home.
Seek out a local face-to-face incontinence support groups.
Find an online "pen-pal."
"Think it through." Mentally image what you fear worse about incontinence and visualize how you will handle it. For example, what if you have an accident in public, or what if someone asks whether you are wearing a diaper? Thinking about it and planning for it can reduce stress.
I have no medical training, so these are just my personal thoughts.
Good luck,
--John