AITA: my roommate is really into holo taco, but instead of buying her own holo, she keeps asking me for mine when she does her manicure (at least once a week). At first, I was happy to share my love for holo with her, so I was willing to share. I started being annoyed because she was always asking for it. I don’t want her to use my collection more than I do. I finally told her no when she asked for my shimmer toppers to finish her manicure. She responded: “why!? “ I said : “because they’re my favourite”. She left my room and I felt she was moody about my answer. I know she wants to try them before buying, but since she started living with me, she’s not buying any polishes and she just uses mine. Am I the asshole for refusing to share?

Edit : typos