I'm going to ask my partner if she'd picked something up from the grocery store
Does she normally get things for both of you at the grocery store?
I don't know what's wrong with her. She never tells me what she bought when I ask about it.
It can be hurtful to have someone withhold information from you. Do you think you ask her too much or seem a bit pushy?
I never forget anything and that's the problem. This attitude of hers pisses me off.
It is understandable to want to have a helpful partner. Have you tried asking her or telling her how you feel about these situations?