If you're curious about someone else's emotions or perspective, first, remember that there are two ways to encode knowledge of how someone else feels: by having a description of their feelings, or by empathizing and actually feeling them yourself. It is more costly --- in terms of emotional energy --- to empathize with someone, but if you care enough about them to afford them that cost, I think it's the way to go. You can ask them to help you understand how they feel, or help you to see things the way they do. If you succeed, they'll appreciate having someone who can share their perspective.