Did u believe on ghosts exist ?

Friends , Did you believe that ghosts exist? Many time we hear old age things and in stories book we read about ghosts , or see ghosts in horror movies . But on a personal not , do you believe that ghosts exist. 

I am scared to be alone at night .  I get up at night for drink water and run to hid on my bed so that ghost don't come 😂🙃                 In my opinion ghost exist . But what do you all think ?