Katey--
Your feelings are totally understandable. I think we all go through some sort of "blahh" feeling half way through our journey. Maybe you need to change your routine a little. Try something different. You may not be getting enough variety which could cause you to be bored and tired of doing the same thing all the time.
You've come a long way already, don't let things get to you. Think of how much your body is loving you for treating it right and getting it back into shape! You're so close to goal. And I know you can do it, you just need to find something to change things a little to bring that motivation back up. Grab a buddy or find a new workout routine. Anything.
OR----maybe you just need to go out and pamper yourself. Reward yourself for what you have accomplished so far. That ALWAYS makes me feel good!
It doesn't have to be something big. Just anything that you feel like you've been wanting to get. Go get your hair done, or your nails, or a new outfit. Anything. Just the other day I bought myself a broom. I was estatic!!
(ok, I'm a little crazy too) but just getting something I've been needing or wanting did make me feel good.
I'm not sure if I've help or not but know that I will be rootin for you during the rest of your journey to lose weight. Keep us posted on how you're doing!!
Marti