Unfortunately, I do not believe in spirits. If they did exist, we wouldn't need to "believe" in them because they would be commonly experienced, so we would know. My nan believed in an afterlife, and said that when she died, she would come back and visit me. 27 years after her death, I am still waiting. It is comforting to believe that spirits exist, and many people after the death of a loved one have asked them to make themselves known, but I don't know anyone who has had their prayers answered.
I am open to the possibility, but belief in something would need to be based on a little bit of evidence.