You know, I've been thinking about this lately, and here's a little story about me to show you a little theory I've developed lately...because I've done
exactly the same thing a few times in my life

. (BTW, I think 160/165 lbs is my magic/evil number).
Here's my tale:
I've never been thin. Ever. Until (I guess) now...I'm approaching "thin," I think. When I was a size 18, a size 10 was as small as I thought I'd ever get -- but I seriously doubted I'd make it that far. So when I hit a size 12 in August 2003, I had all these thoughts in my head like "Okay, that's gonna be it for me" and "Well, I've never been smaller than this, so I guess I'm done." So I went OP -- not WILDLY OP, but OP nevertheless -- for 18 months when I moved to the UK. When I came home, I realized "hey, maybe I CAN get smaller!" But I swear, I never in a million years thought I'd make it to a size 10. But I did -- and I was shocked, elated, etc. Then it slowly dawned on me: "hey...size 8 is out there, too." But that seemed utterly impossible, I mean
I've never been a size 8 in my life! That's CRAZY talk! I swear, I went straight from kids sizes to a 10/12. And around the time that I was struggling with this, I found 3FC and realized maybe I COULD do it...just maybe...
And now I'm a loose size 8.
Do you see the theme? WHAT was getting in my way?
ME. And THE WAY I TALK TO MYSELF. I'd never been below a size 10....it wasn't part of my life experience or reality. I couldn't
picture myself below a size 10. So in a weird way, I guess I was sabotaging myself because
I didn't believe I could do it. I was willing to settle for what I had been before.
It's a mental battle, it really is. And I think if you change your way of thinking -- accept what is TRULY possible -- you'll see a change.
Just my theory

.
PS:
What's next? Size 6. But that seems utterly impossible, I mean
I've never been a size 6 in my life! That's CRAZY talk! 
(wink, wink)