Are Fairies real or not?

We all know about Tinkerbell, but the biggest question buzzing in children minds, teens and some adults is if she has any sisters, brother, family friends or is she the only one. Some say she is the only one and others say she has family and friends. Most people believe that fairies don't even exists and if you believe in fairies you are crazy so if you are one of them, then you must think that I to am crazy.