This. And if there isn't some form of calorie burning activity that interests you enough to do (while adding the fact that you'll probably live longer if you do it), you just aren't trying very hard.
Sorry if I guessed wrong, but I bet you didn't need to try very hard. I bet whatever exercise it is that you do, you saw people were doing it, thought "that looks fun, I really want to try that", tried it and had fun. Or at worst, tried it, had no fun, but thought "That was no fun, but I can definitely tell that when I've practised a bit and got the hang of it, it's going to be fun."
Some of us aren't wired that way. I went skiing last year. I did it as a kind of favour to my sister, who really enjoys the snow. I thought, well I don't see the appeal, but she enjoys it, and lots of other people rave about it, and they can't all be wrong. I did 3 days of lessons, and from what I understand made better-than-average progress. It was alright. I'm glad I did it, but I wouldn't do it again. On the fourth day, I decided that the cost of an extra day's equipment hire -- and the discomfort of walking in ski boots -- outweighed the benefits, so I wandered around Whistler village while my sister rode the mountain. When we were due to meet up, I stood at the bottom of the run watching people coming off the mountain with massive grins on their faces. It made me feel a bit flat -- these people are having a wonderful time; they're prepared to spend large amounts of time and money on clothes, equipment, travel, lift passes, because they enjoy it so much. Why is there not an exercise I enjoy that much?
People like me have to repeat that experience over and over again, with different sports, before *maybe* stumbling upon the one that clicks for them.
Or, as I do, run around the block once in the while, because although it's no fun, it's cheap and keeps your heart and lungs working.