I think it's about her being irritated with herself for falling in love with someone that she shouldn't. She knows there will be no happy ending and that it will be her 'downfall', and she's constantly trying to convince herself that the person she wants isn't hers, and owes her nothing, so she shouldn't be feeling so 'emotional' about it. She's basically fighting her own feelings. X
I think it's about her being irritated with herself for falling in love with someone that she shouldn't. She knows there will be no happy ending and that it will be her 'downfall', and she's constantly trying to convince herself that the person she wants isn't hers, and owes her nothing, so she shouldn't be feeling so 'emotional' about it. She's basically fighting her own feelings. X