Help yourself

I have been terribly concerned over a friend who is battling depression and can't seem to get better.  I've decided there is nothing more I can do but turn it over to the Lord.  I probably should have done that first instead of just asking for his help.  First I tried all I remember from Mental Health classes, then all I've learned in studying religion over the years then I gave it over.  I asked two church members to pray with me at the altar and still my friend sinks deeper and farther away.
Now I ask for prayer for me because I am afraid I am losing patience with her.  We all have reasons to be depressed if we focus on our personal stressors.  I can't make her see that inward focus on personal woes is self defeating.  Any Ideas?