Kick Starting My Weight Loss

I've decided to not jump into anything feet first as you can put your body into shock.
I've changed my diet a lot, I'm trying to drink two litres of water a day, I've decided the way I can personally do this is by having a pint glass with ice, and fill it with water. Four of these a day and I'm over two litres, I also drink at least one cup of green tea a day, I have various green teas with different things in them, I particularly like Green Tea with Lemon, and Green Tea with Mango and Grapefruit. I've only been doing this for a couple of days, but I can already feel my body feeling better, I feel less tired and 'groggy' and I find it a lot easier to get up in the morning. I've also replaced white bread with wholemeal bread, when I was a kid, the thought of eating brown bread was dirty, it always had to be white, but now I am enjoying eating these things. I've also started drinking cranberry juice, which again, I used to really dislike, but now I quite enjoy a small glass of it in the day. My biggest thing I need to tackle is snacking, instead of grabbing a back of crisps, I'm buying in blueberries and almonds to try and eat them instead. Curbing cravings is the hardest thing, but by drinking all this water I don't crave as much as I used to, I've told myself if I want to snack, to drink a glass of water and if after that I still feel hungry to grab a piece of fruit, not my favourite pack of walkers!
I'm also trying to decide which form of exercise to take on, I enjoy swimming, but I hate my local swimming baths, for the fact the 'cute guy' from my year in high school works there, and getting my legs out in front of him is still something I need to battle. In the time being I've been going for a brisk walk with my dogs up the local river path and then across the field giving them a good run as well. I also have a cross trainer/elypitical bike, which I'm going to properly start using soon.
My weight has been an ongoing battle for me, and for years nothing has worked for  me, but I feel that if I share my progress on this blog, it will give me the drive I need. I'm not asking to be stick thin, but I want to drop a couple of dress sizes and most importantly feel fit and healthy as I come from a family on both parents sides with diabetes and heart problems, so I need to do all I can for myself!