Don't despair. It gets better. Try to remember that you are a person too and can't wait to live life until you are thin. That's what I had to tell myself years ago and still tell myself today.
I also look in the mirror full length, naked and find something about my body to like and admire. I like my face and my butt and my waist and my arms. It takes patience but you need to keep at it.

I have gone on vacations, climbed a waterfall, gone snorkeling, got facials and body massages and been in pools and hot tubs all at 300+ pounds. You can't put your life on hold until you lose weight. Each day is Gods gift, enjoy it whatever your size.

Regards the depression. Do you get more depressed in the winter? I have SADs (seasonal affective disorder) and I know in the winter or even after too many cloudy days (3), I go into a deep depression that has no cause. It's only knowing that I have SADs that helps me cope and controll in instead of becoming blindsided with it.