Why?

Why am I so stupid? Why do I not believe what I know to be true? I have an awesome God who loves me UNCONDITIONALLY, and even sent His Son to die in my place and yet why do I still doubt Him???! I have a Creator who loves me and made me for Himself, yet why do I hate myself and doubt His love? I've known these things from birth and yet I still struggle to believe them. I was having a loving arguement with a friend tonight. He'd written about how he'd felt during a period of depression. Suddenly my memory went back to how I'd felt ( and still sometimes do!!!). A cascade of questions followed, leading to many tears, much provokation of thinking and feelings of weakness and a huge lack of work! Once again my thinking was challenged and at the rate I'm going at, my friends will be decreasing as they rapidly begin hitting their heads against the wall in frustration. Questions like "Why don't you believe God loves you?" arose, followed with challenges as to why I don't separate the sin from myself to reveal the sinner. We are told to love those around us, yet the only way to do that is to hate the sin whilst separating the sinner from it. How can I truely love those around me when I won't allow God to? Challenges to my love issues coincided with issues of being too stubborn and pride.
"but God loves the worst of the worse unconditionally, no one can ever do anything to say he/she deserved it, but God loves us all so much...that's quite a big massive thing that we must believe in because if we think about it logically or thoughtfully it just seems like it can't happen"
"God has created us in His own image, we are fearfully and wonderfully made. there is no one else in the entire universe who could make a human the way we have been made and so we should not speak about ourselves with dislike and hate because behind it we are saying to God that He could do better
"you are the best person at being you and thats what God loves"

Oh, Lord, teach me to put on Your armour each day. Teach me not to relay on my own strength but wholly lean on You, for You can carry the weakest of followers!!! Lord, thank You for all that You've done for me in the years past. Help me to count my blessings daily and to never forget them. Help me to see myself as You see me. Lord, help me to forgive myself as I try to forgive others. Lord, help me to remember that You made me perfect - exactly how You want me and although I cannot see it, teach it me. Everything You give me is for a purpose and although I cannot see the end, may I grow from this. Lord, HELP ME PLEASE!!!