fcma172 said: I think Ruko is trying to say she's leaving because she thinks Chibi Miku doesn't like her.
Correct me if I'm wrong,m but that's my interpretation.
sakami-chan said: I think that Ruko that Miku would be sad that she was leaving but instead she got all mad.
Both seem to be half-wrong on both parts. Ruko is moving away (for whatever reason that we don't know yet) and knew that Miku would be upset. She feels that if she ever comes back to Vocalo Town, Miku would be mad and resentful of her for not telling her that she was moving away beforehand and/or suddenly leaving all of a sudden.
Ah, friendship seems so very precious for Miku-nee.
I think what Ruko said is that if Miku know that Ruko is going to leave, Miku will very sad but Ruko don't want to see Miku feel sad, so Ruko wants to make Miku angry so that Miku will not be sad for Ruko's leaving.