Answer:
I am a sound made by felines when petted.
I always follow you around, everywhere you go at night. I look very bright to people, but I can make the sun dark. What am I?
What happens once in June twice in August and never in May?
When I come in from sea to shore twenty paces you'll see No less no more.
If you lose me you may cause people around you to lose me too.
Give it food and it will live, give it water and it will die.