But I hate going to the gym!

So do I. When I went to the gym it was usually boring for me. Not social and I really didn't like working out by myself. Now I only go about 3x a week. And it is mostly just to use the pool and to do some strength training, but most of the time I work out at home. Most of my exercise is doing things that I like to do. For example, skiing, biking outdoors and running outdoors. Plus I also took up skating. If you are not an exerciser, then I recommend walking outdoors. Find a nice place to go for a walk, or even if you can't find a nice place, walk to a store and back and when you get there, buy yourself a small treat. As long as your treat fits into your diet. One of my favourite treats is a small latte. Has about 120cals in it, and it is worth a walk to go and get it! This mock "forging for food" strategy is something our ancestors would have done, and the reason they were not fat. Make sure the walk is long enough that it burns more calories than the treat itself. Unless it fits on your diet anyways. Exercise in my opinion should always be enjoyable, never stressful. It should also be something that you enjoy doing.