Freedom

I really feel happy that i had grew up, it means that i have freedom to do something what i want.

I am happy/glad that I have grown up [matured].  This means that I have the freedom to do whatever/anything I want.

Here "anything/whatever" means "anything you want to do".

Maybe you want to get married.  Maybe you want to buy your own house.  Maybe you want to climb Mount Everest (just kidding  ^^). 

I desire freedom because it makes me happy.

what is the happiness? i think that there are many things could that can make men feel happy.

, also, there is are also a lot of things that you did't care about could, it worth us to thanksgiving, just take for granted, such as like health, friendship, love……

when you "take something for granted" this means that you should appreciate/be thankful for that thing, but you are not appreciative/thankful for that thing.

I took my great health for granted and ate a lot of fast food (McDonalds, Pizza Hut, ect) .  It was until I found out I was at risk for high blood pressure, did I watch what I eat.

你写的很有道理。

Freedom

I really feel happy that i have grown up, it means that i have freedom to do anything what i want. i desire freedom, it makes me happy. what is the happiness? i think that there are many things could make men feel happy, also, there is a lot of things that you did't care about could, it worth us to thanksgiving, just like health, friendship, love……