I realized I am withholding information in my relationship, how do I solve this problem?

When she asks about my day/work, I cut it very short and when she asks for more information about my work I get irritated. My work is not secret or something I think the case is I think a lot in my head about work and I get very lazy to explain later on. She gets upset by that.. How can I solve this?

I realized I am withholding information in my relationship, how do I solve this problem?
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