Give up 电子邮箱 account?

I want to 删除 my YouTube account because I feel that I'm not 安全 anymore. But I figured that I also had to 删除 my:
Web History
谷歌 Talk
and GMAIL?!

Okay, I will defineatly give up my YouTube account, but I JUST CAN'T 删除 MY GMAIL!!

So.. WHAT DO I DO?!