I Need Someone to Talk to

Mistaken... Even though I am young, I have made many, many mistakes. And done a lot of stuff I truly regret. I'm depressed, and have been for 3 years now. My self esteem has slowly diminished since I was 9 years old. I'm really looking for one person who I can tell everything. And they won't leave. I know I am a horrible person, and I need to change my ways. But I need encouragement. And i'm too scared to tell my current friends the monster I really am. :(