Losing the weight won't change your life or your perception of yourself.. it just makes you thinnner...
Happiness comes from within yourself - as trite as that sounds - it doesn't come from a number on the s cale or the size in the back of your jeans.
Why would you think all your hard work would be useless? Do you like what you're seeing right now? Do you feel a sense of accomplishment?
At what point do you see yourself moving from
weight loss mode to maintenace mode and what's your plan for that? What would your goals be for after that?