Abuse can often make it very difficult for us to trust God, and to trust others. But don't despair: littleness is the essential category of God. He's an artist with the mustard seed. As soon as you've told Him that you feel you can't trust Him, but that you'd like Him to help you, that's a little bit of trust, right there. Keep going. "Lord, I believe, help my unbelief!" is the most viscerally human prayer in existence.