Well I know NAMI has support groups everywhere. Sometimes there are outpatient support groups at various clinics. There are specific mood disorders support groups that are facilitated at various locations as well.
While I have yet to actually attend a meeting held by this group, I have found a few meetings in my local area that I am considering.
http://allone.com/12/ea/#HaveAGreatDay
Hope this helps you, and anyone else who might read this. I can currently relate, as I am stuck in a moderate depression, and the feeling of loneliness is even more exacerbated.
- HoneyNut