I just found out that I weigh more than my fiance and he's 190#....

What is wrong with me? Why can't I lose weight? I gave up fast food, I walk everyday and I don't drink or smoke....I just don't get it, I am on the edge of my sanity...Iv'e been overweight for as long as I can remember and no matter what I did (Slimfast, Curves, strenuous exercise) nothing worked, or for very long. Back before I met my fiance I was down to 180# but I looked good. I am 5'7 and got REALLY wide shoulders and a big bust....so my shape does not resemble Jaba the Hutt or a pear but more like Chyna from WWF (but a fat version of course). I got BIG boobs (which I hate), thick thighs, but not overly fatty, big arms (mostly fat) and a mid-section tire.
I have seen a doctor about my weight, but he said I just need to eat less and exercise...DUH!!! But lately I Am so stressed and becoming depressed...this does not help my motivation to lose weight at all...Some mornings I wish I could curl in a ball in my bed and stay there all day...but I got to work...
I'm not sure if he knows yet that I weigh more than him (but I'm pretty sure he can figure out that I am tub of lard), but this is so embarrassing I want to run away and hide until I get back into shape...