A childhood belief about ghosts

Recently an American girl came to our school for a term, and I was best friends with her. She told me and a bunch of friends how to summon Bloody Mary. My friends said 'I'm not doing it - I'll die!' and my friend just carried on, making them even more scared. I said "I'll do it." and so we went to the school bathroom, and I did it. They all ran away screaming...even though nothing had happened. They believed I was possesed for the rest of that year, even after the American girl had gone. This belief has escalated now into them thinking that I'm a ghost buster. We were thriteen and now many of us a fourteen. They're still my friends...they just star every introduction with 'and this girl's a ghost buster...'