I don't think you can "force" yourself to get willpower.
Look at your starting weight, then your current weight, you've done very well!
But you've plateau'd, and whenever that happens it's very demotivating.
There are many things you can try to get the weightloss started again, changing food habits, trying a different work-out routine, your body adapts to exercising, if you do the same routine for months, you'll need to change it up.
How many points are you on, and do you use up weeklies, activity points?
If you use a lot of weeklies/activity points try cutting down, or if you don't use them, try using them more often.
Your body is stuck in a rut from eating the same amount of calories each day, try to rotate, 1 week, use weeklies, next week, don't use them.
This way you can "fool" or "confuse" your body and may get things going again.
Try anything you can, just don't fall off the wagon, you're going to regret it later.