2-3 pounds a week is a bit much for most people, unless you are obese, 1-2 pounds a week is a healthier rate. Like Dallen said, don't just think short term, think long term. Starving yourself and screwing up your metabolism will do more harm than good. Realistic goal setting is one of the most important aspects of successful weight loss. If your goals aren't realistic, everything you do from that point on is setting yourself up for failure and disappointment.
Fruits and veggies are great - eat them everyday, just eat other things with them. Try to get a protein/carb combination every 3-4 hours. Like fruit and cottage cheese.
Crunches are often preferred to situps as they can stress the lower back - try crunches (p.s. - doing a ton of crunches won't give you 6 pack abs). Also, leg lifts will not magically melt fat off your thighs either (wouldn't that be awesome though?
). It's good you are being active, that's important. Swimming/walking, etc are great ways to exercise.
In a nutshell...
*eat more (and of the right things)
*modify your exercise to include some strength training (no, it won't make you look like a football player)
*and most importantly, change your goals
