It sounds like she has a script in her head. She's written a story that ends with "I can't do it anymore". I don't know this store and I don't know you, but I think the idea is to help the story lose credibility. "I can't do it anymore" implies she's weak. "I don't want things to turn nasty" implies you're weak and may turn mean.
You may not be helping by denying your past problems, but you can certainly conduct yourself in a way that challenges that assumption.
Resentment occurs when we aren't doing what we need to care for ourselves, though we expect others to do it for us.
