Pretty doesn't cut it.

Pretty is what you use when you
Describe something temporary;
Something that fades away.

Pretty is what you use when you
Describe something shallow,
It can only depict the shell.

I wouldn't use pretty to describe you
Because it will only fall short.

You are not pretty.

You are beautiful.

And it takes a lot of looking to find, for it is not superficial. It can not be seen with a judging eye because

Beauty is the essence of the soul.

And it takes a lot of heart to see.