Hi Krystal!

I would check with your county agency. Social Services has wonderful mental health supports they may be able to help your grandmother. I understand your grandmothers reluctantcy to discuss her depression. It's a very hard thing to deal with let alone letting others in as well. I do agree with you however that it does help to talk about it. I really dont know what other avenue for you to take. Maybe, you can contact her insurance carrier to get a list of therapist that participate with her insurance.
Please let us know how is go's.
Good luck!! : )