I don't guess people's weight because I'm bad at estimating such things.
I'm going to add to the "you're not fat" chorus but with this honest statement, since you asked - you are overweight. I'd say an easy majority of the people I know are overweight. We do live in the land of the large milkshake, and most of us don't hunt buffalo or work in the fields, so big surprise, we're not living up to our potentials anymore.
The only reason I'm not overweight is good genetics. I get no credit for it. I eat crap and don't exercise, just like everyone else.

I am, however, extremely weak.
Pet Peeve - not being able to run very far at all. Was reminded of this today.