Answer:
I am always in front of you, but you will never see me. What am I?
Two in a whole and four in a pair. Six in a trio you see. Eight's a quartet but what you must get is the name that fits just one of me.
I am a way to say goodbye to your sweetheart
What starts with an 'e' and ends with an 'e' but only has one letter?
If you've got me I'm everywhere. If you share me I'm nowhere. What am I?
No matter how little or how much you use me, you change me every month.