Compared to who?
There is a big difference between the doctor telling you that you need to lose weight compared to a celebrity.
Attractiveness is a matter of perception. What you find attractive is different from someone else.
Intelligence is about time. If you choose to put your focus into something, you'll get smarter at it with time.
You are as fat, thin, ugly, attractive, dumb and intelligent as you believe – when you do just one thing: stop comparing yourself to others.