Maybe you have depression because of your weight before. Even if you lost the extra pounds, the depression will remain. This is just my opinion though. I am depressed too and i am bored with everything even in losing weight but i force myself to do it because i don't want to be called fatso again and be prone to all types of diseases. I include on my regimen, a 20 minute yoga that helps me relaxed my mind and body. Maybe if you will try it, you can get back your enthusiasm again.