I Battle Self-hatred, Anxiety, And Depression

Although it hasnt been proven by anyone, I know im depressed.My mood changes easily, i always feel alone, and I hate almost everything about myself. no one in my life has seemed to notice that I feel like this,and I want to tell someone,I want help, but I cant find the courage to tell them. I dont know what to do anymore, it has changed how I act so much in the past year or two. I hope someone can save me...but, mabye none of that matters anymore.