What Am I Riddles

Question: Touching me is inevitable, I send chills down spines, yet none fear me. What am I?

Question: When you say my name, I am no longer there. What am I?

Question: I can be seen, I can be not. Thanks to me, you'll fall in love. I mostly am sweet, but once I were sour. You can receive me, you can't just buy me. You only can send me, or simply share me. What Could I be?

Question: If you aim to give us a shot, we'll riddle you.

What are we?

Question: Round like a apple, deep like a cup, but all the kings horses can't pull it up.

What is it?