Of course, ASR had no reason to blame Khushi..
But to me it didn't seem like he was blaming her..It seemed more like he was shocked..and hence his statements.
When he says: 'Tumne bathaya kyun nahi !!' or 'Kisi ko kuch patha kyun nahi !!'...I felt they were more of exclamatory statements he made out of his shock and confusion, than actual questions.
I may be wrong as well..and maybe I need to watch the actual epi before arriving at conclusions...