Taking him to a therapy session or psychiatric visit would be ideal as potentially being helpful. But you say doing so is difficult.

One suggestion is to investigate any EAP (Employee Assistance Plan) you/he may have. Most firms have this and fail to inform their staff. Do NOT confuse an EAP with employee insurance and benefit plans. An EAP is an informational service that finds confidential resources. Obtaining for you a free consultation with a therapist is an example.

If that is not an option, contact your local mental health association. They will have resources regarding available therapists including those that do pro bono work or charge on a sliding scale.

i advise you too to investigate what support groups are in your area. You may find one specifically for friends and loved ones with mental illness. even consider one pertaining to your illness. Many of them will welcome a support person (ie spouse) to an introductory meeting. Mine does and I find it to end up being beneficial to all of us having an opportunity to relate how our mental illness has impacted the lives of those who are in our lives.

Finally, and this is the difficulty, you need to consider whether or not your current situation is at all enriching. Is it over all a 'nourishing' relationship?