Did you ever have characters who after you wrote about them kept bothering you?

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I have lived with the six main characters in my three day novel for about four months. I thought once I got the novel written they would at least be out of my head until it was time to edit, but I was wrong. Last night, one of them was the subject of my dream. He's the sweetest out of the whole group and his girlfriend kind of sucks which I feel bad about because I made her up. So now I feel obligated to write another story. Fellow writers, have you ever had this situation? What did you do about it? How did you finally trick your muse into thinking about something else?