Getting back to the OP, I do believe depression can result in trouble praying. You pray, but it seems like those prayers hit the ceiling and come tumbling back down. In history, this has happened to many Christians, and it is called "the Dark Night of the Soul."
I think you need to get some counseling, as you are not over the trauma you have experienced. As far as your relationship with God, DO NOT GIVE UP!!
Further, I would read the book of Job. (I'm reading it right now, on my read through the Bible journey!) It shows a man who was blameless, and yet he suffered, and experienced terrible depression. To the point where he wished he had never been born! Job is a good friend to have alongside when you are depressed.
Even though Job is miserable, there is something comforting to me about knowing that God does understand depression, and he is there through it all. He doesn't have to give us pat answers, because he is beyond that. But he does stay close by, and comforts us.
"Blessed be the God and Father of our Lord Jesus Christ, the Father of mercies and God of all comfort, [SUP]4 [/SUP]who comforts us in all our affliction, so that we may be able to comfort those who are in any affliction, with the comfort with which we ourselves are comforted by God. " 2 Cor. 1:3-4
Further, in the Old Testament, God does talk about being depressed. It doesn't show up in a lot of translations, because they translate literally. This is from Holmans' and it really speaks to me.
"Why am I so depressed?
Why this turmoil within me?
Put your hope in God, for I will still praise Him,
my Savior and my God.
[SUP]6 [/SUP][SUP]I[/SUP] am deeply depressed;" Psalm 42:5-6a
I know I read these words about 11-12 years ago. I was terribly depressed from the pain of untreated Rheumatoid Arthritis, which had permanently grounded me, or so it seemed. Reading those words made me realize I was not alone. God understood depression, and God's people had been depressed, and called out to God.
Please read the Psalms, they are great encouragement. I read 5 a day for about 3 years, and they just pounded God's grace, love and mercy into my brain. And consider Christian counseling, and working through this grief you are going through. You are turning that grief inwards against yourself, and you sound like you need help to get you out of this despair.
As to ABMF, my thought is you need to go elsewhere. This is a Christian forum, and we serve Christ. Not demons and people who see demons under every chair.
PS I am not depressed, and have not been for at least 10 years. No demons were afflicting me, just real life circumstances of pain and loneliness. God did an incredible work in my life, lifting me out of that depression, setting me on the path and directing my steps! I can only praise him. Even now, in pain, I simply cannot go back to that pit of despair and depression. God is just so real and so caring, and I know that he is working all things together for good, even if I cannot see his purpose at this time.