I have a ghost friend named genna. I befriended her and no one believed me do you think she is real or not

She would

Grab me when I jump into a pool

Not let me go under watter

Bugging my friends

And playing with my stuff

Is she real

If you are not letting your imagination run wild and she is there even when you are not thinking of her then I would say she is really a ghost and not your imagination.
What things does she tell you about herself?

Only you can decide what is real or true for you.

I once had a friend named Carter and he died at my birthday party. We all went in after swimming and when my mom took count of all the kids Carter was missing. We looked every where and later we found him at the bottom of the pool. Every time I see water I feel Carter there. He splashes water onto my floor and over the walls. Don't be afraid your ghost won't hurt you if you never hurt them