Is is

Usually I don't pick on how people talk. Okay, that's a lie. I make fun of people all the time, including myself. "And then I'm like, 'Whoa,' and then he goes, 'I know, right?' And then she's all like, 'Yeah right.'" What did I just say? Nobody knows. When did the words "like" and "go" become suitable synonyms for "said"? I'm totally confused by why we all talk like that. Of course, I guess the alternative might be, "So I says to Mabel, I says..." Perhaps that wouldn't sound as stupid.