So basically she was crushed by the weight of expectations he unknowingly set upon her.
Neither is at fault really because he genuinely believes in her strength and potential while she is also valid in feeling of letting him, the only one who believed in her amongst their mage peers, down.
They just needed to talk this one out and it'll be okay. I wonder what the staff/rod she was shopping was for since stronger magic won't help with mobs with high magic resistances. Would be really cool if it was supposed to be a gift for our errand boy.
Will do ANYTHING for a cup of COFFEE