Hermione's Sigh

[Robert Jones]

No: HPFGUIDX 89348

In OOTP, ch. 26, p. 572 (US ed.), Hermione is explaining Harry's 
problem with Cho to him, and says that he should tell Cho that he 
thinks Hermione is ugly.  He says he doesn't think she's ugly and 
then Hermione says he's worse than Ron and sighs ". . . maybe not" 
as Ron walks in.

Can someone explain the significance of the sigh to me?  Not being a 
15 year old girl, I don't understand.

It could mean: 

(1) She thinks Ron is worse at expressing his feelings towards her, 
and she wishes Ron were better at it.

(2) Ron has been expressing his feelings toward her, and she wishes 
he would stop annoying her because she is not interested.

(3) Ron has been expressing his feelings toward her, and she likes 
it and wants him to actually do something about it..

(4) She wishes Harry would be "worse than" Ron here and express his 
feelings about her.

(4) She thinks all boys are jerks when it comes to expressing 
feelings.

Any other possibilities?  Help.