I am at my heaviest as well. I am up to 230, and my target weight is to get back down to 160. I use it as motivation to get up and stay moving. I have lost 5 pounds, and once warmer weather hits, I'll be sweating it out on some scenic country roads. Just find your motivation and don't be satisfied with any less effort that what it takes to get the job done.
If you want to lose the weight, use that desire as fuel. Do it. The urge to cry and anger are perfect emotional motivators for exercise, because it can urge you to push hard. If you start to exercise and begin crying at some point (this is common in exercising. Exercising does one thing better than the world's greatest psychologist; it tears down emotional walls like a wrecking ball.), then have yourself a private cry on the side of the road, pick yourself up, wipe off the tears and put in one more mile, go home, clean up and relax.
You have the power to change yourself. You just have to find the fuel.