How do men feel about Women who have lost weight?

Hi,

I'm a female, and I've been pretty healthy all my life( 50th percentile until 2 yrs ago when I started gaining weight). I weigh about 165lbs currently and I am 5'4". I am also currently single.

My biggest worry about when I lose weight (going for 120-130lbs), is that I'm going to find a significant other and he is going to find out I used to be overweight. If you found out the girl you are seeing used to be 40lbs heavier how would you feel? I need honest opinions. Would you look at her differently? Is it a turnoff? Please comment!