People like to make songs and dances about how eating veg and working out will get you thin - that's not necessarily true. If you want to drop some weight (and not necessarily "get buff" which is not the same thing), gradually cut carbs out of your diet - they're the primary energy source in an average diet and it's the excess unspent energy what leads your body to stock up on other nutrients, mainly fats. Don't go for a draconic diet - not only it won't work right, you'll also yoyo right back to where you were beforehand. You have to trick your body to switch from stockpiling fats to burning them and to do that, you need to lower your energy intake. Carbs aren't just sweets - it's also pastas, breads, sugars and a great number of vegetables, like potatos. Cut down on those and you'll cut down on your energy intake.