Oh my god, I do that too. Haha.
I recently realized I do that with everything though. I get 85% through a video game and then I lose interest.
:I
I'm trying to force myself to do things, like the more I yell at myself "Okay Autumn you don't have to be motivated. No one cares if you have a pep in your step just do the f'ing workout"
That usually works, I have to be tough with myself when I get bored or lazy, because it's like being sucked into a big black hole full of crappy excuses.
Anyway, now that my rant is over, I wish you the absolute BEST of luck. This time will be the last time you ever have to re-lose weight if you can talk yourself into it!!
and I believe that you can.