Weight

Depends on the question. Of course it's natural to be uncomfortable with your weight. Everyone else is, so why not you?

134 sounds high for your age, but that's no guideline at all.

Your age doesn't really matter it's how tall you are. Nobody can answer your poll inless they know how tall you are. What you really should be asking yourself is;

Do I eat healthy?

Do I get enough exercise?

And be honest to yourself.

I'm fourteeen 5'6 140 lbs nd i think i'm average but every1 keeps sayin i'm fat. does any1 know

That's in the normal range according to the Body Mass Index.
Hey, Jack, you're fourteen. Your body's changing so fast, if you're quiet,
you can hear it. Just get your exercise and don't worry.

We all know that the answer to those questions are all no.

Same damn scenario, different kid.