ARGHHHH!!!

Frustrated! I've been exercising and eating better and I have not had any significant weight loss. I am going to measure instead. Maybe I am losing inches. This makes me want to take drastic measures. I'm already only eating one meal a day. I replace breakfast and lunch with shakes and I eat three healthy snacks. What am I missing? What am I doing wrong? I am very discouraged right now, but if I don't do anything I will just stay where I am. I'm seriously losing my motivation. When I was depressed two years ago and going through all that stress, it seems like the weight just fell off. Now I am really focused and doing my best and nothing. If I cut my eating to much I wont lose, if I eat to much I wont lose, if I don't exercise I wont lose. I guess i'll just keep going. Reluctantly...