I repeat things, because repeating things is a good idea. From "The impact of repetition-induced familiarity on agreement with weak and strong arguments":
Repeated statements are perceived as more valid than novel ones, termed the illusion of truth effect, presumably because repetition imbues the statement with familiarity.
Often this the case with destructive relationships. Do we actually grow up. Or do we simply find someone that is willing to deal with our repetition.
Go forth and repeat thyself.