Answer:
I make everyone blind. You can't see me but I will always come back for you. What am I?
I give people a huge fright but at the end I'm sweet. I normally celebrate at night when there's less heat.
I am a ship that can be made to ride the greatest waves. I am not built by objects, but built by minds. What am I?
I am used when you jump off a bridge for fun.
I always go to bed with my shoes on. What am I?
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.