Where do you draw the line?

Today I've been dwelling on this thought, "There's a fine line between a lack of trust and being realistic. Where is that line?"

This is just more of a vent post. I struggle. Daily. Am I not trusting in what God can do? Am I not fully relying in faith that He can provide for my every need or am I just being realistic that He will not swoop down and fix the problem? I'm angry today. I know that doesn't "help my cause" with God, so to speak. Sometimes it gets wearisome when I pray for others and I see God answer in a mighty way, then sit and wait while He [seemingly] remains silent in regards to my own requests.

In all honesty, I don't think my anger is directed towards God. I think I'm angry with myself for wavering. I don't think I really know the answer to my question above. I don't know if I am just being realistic in knowing that I screwed up and need to learn, or if I am lacking in my faith & trust that God will provide for my every need. I almost feel like I need some counselling today. I think I'm losing my mind ...