She might be paranoid!

You should've said no, you should've gone home, you should've thought twice before you let it all go, you should've known that word, 'bout what you did with her, would get back to me... And I should've been there, in the back of you mind and I shouldn't be asking myself 'why?' you shouldn't be begging for my forgiveness at my feet... You should've said no, baby and you might still have me!