Here is the trick, keep your cabinets insanely stocked so you don't get bored.
After your bowl of cereal, if you were craving something salty, you should have had a 100 calorie pack of crackers or some veggies with dip.
As for the motivation, only you know what will do it for you sweetie
You can get all the support in the world but until you whip your own butt in gear, you will just be spinning those wheels.
I find that it is a huge lifestyle change. I don't know if body image ever improves after huge amounts of weight loss, but be prepared that your image of yourself and how others perceive you is often quite different.
Don't starve yourself. Small meals and snacks, several times a day to keep that hunger away but watching those calories will do it.
They say one of the huge differences between thin and over weight people is that thin people ignore that hunger feeling longer, while over weight people tend to think it is an emergency and eat right away. Try to keep yourself busy once you catch yourself day dreaming about that pasta
Good luck to you, and let us know how it goes!