Taking control of my life and my body

when i hit 25 years old 3 years ago, i gradually started gaining weight. i didn't think anything of it, i just continued on as i normally would have. i did notice that i was having to buy clothes 1 size bigger each time i went shopping, but again, i didn't think anything of it .....whats one size bigger right? well, i kept getting one size bigger each time thinking, ok its just one size.....one size several times ended up being several sizes bigger...and thats when i realized that i was no where near being able to fit into clothes i would have worn when i was 25. i tried dieting and exercising, but i didnt have the will or the energy to stick with it....my body was winning, it was getting what it wanted, laziness and high fat food. when i joined spark people, my mind was set to motivation but my body wouldn't have that, so it fought back and of course it won....but i didnt give up there!!! i needed more of a plan, something i could stick to. 7 weeks ago i joined weight watchers and am loving it so far...my body is liking it too....i am able to stick to my points no problem and if im hungry and dont want to use points, fruits and veggies are 0 points, so my body gets the satisfaction of being able to eat whenever i want to. i now crave healthy foods rather than high fat foods...thanks body for finally agreeing..lol i am still struggling with exercise though...i do workout everyday and participate in many team challenges here on SP....but the problem is that i am just walking right now...dont get me wrong, walking everyday is great however i need to add some variety, maybe even pick up the pace a bit, add intervals, run. i also have not added any strength training, which i know is extremely important.....this is my goal for the week. i am gonna slowly get into doing it, my body is just gonna have to get used to it!!! lets see how it goes