Good luck, and I support you. You can do this!
I can completely sympathize with you and your situation.
My story......after years of turning to food to make me happy, or get me through something, I had found myself at the age of 35, 5'7", and almost 300 pounds. 295 to be exact and a 46-48'' waist. I knew things had to change after a night of going dancing with my friends. I love to dance, and in the past, could go on all night long. That night, after one song, I was out of breath, and had to leave the floor.
This was me at my heaviest.
I started by modifying my diet.
No more fast food. No more regular soda, no more cookies and potato chips. No more snacking when I was bored. Breakfast was a bowl of healthy cereal. Lunch was grilled chicken, tuna salad, sandwich on wheat. Dinner was whatever I wanted, as long as it was only one serving. Limit my bread intake, increased my salad and vegetable intake.
Snacks were sugar free jello, or unsalted, dry roasted peanuts. Tons of spring water. Force myself to drink V-8 juice.
Exercise 3 times a day. In the morning, do a workout video called "Walk Away The Pounds" with Leslie Sansone. 3 videos, 1 mile, 2 mile, and 3 mile walk, incorporating weights for armwork. After work, I hit the park to speed walk around the track. Right now, up to 3 times around, just over 4 miles.
Since starting this diet/exericse program, I've lost 80lbs, and gone from a size 46 to size 38-36 waist. Currently about 215lbs, but I'm determined to get down to 185, which would be 110 pound loss.
Here is a pic of me taken about a year ago.