Good Riddles

Question: People are scared of me but I am loved by some. I can be your best friend but could become your enemy in a blink of an eye. What am I?

Question: I am longer than trees I am longer than earth ...but lower than grass What am I?

Question: when you were born you were given 2 bottle. 1 has something bitter but one has something sweet

Question: I tear paper but I'm not mad,
I wear a purse but it's not a fad.

Who am I?

Question: Everything is what it is not, but everything is not what it is. So what is everything?