Caroline, welcome to FitDay!
It sure sounds like you've got a full plate (no pun intended
I, too, love to eat. And I must say that tracking my food intake and exercise on FitDay is the only thing that has ever really worked for me.
It's going to take a little effort to put your data in and figure out a daily calorie deficeit that will allow you to lose weight while being enough to keep you from "cheating".
I will tell you that yes, you can pretty easily lose 70 pounds in a year if you're serious about it. That's only around 2 lbs a week, which is consider a safe rate for most people (never a bad idea to check with your Doc, though).
Spend some time reading the threads in the sub forums here--there is a lot of great info and advice and many very nice people. The Women's forum has some great weekly motivational threads.
If you have any questions or need/want advice, please don't hesitate to ask.