What "little thing" made you realize your ex never liked you?

For me it was my presents. When I first met him, I really liked a particular music group. It wasn't because of their looks, but I couldn't deny that their looks were part of the attraction.
I spent a lot of time talking about them and watching their content. Then life happened, and I started focusing on myself and going out. We weren't together, but he bought me a birthday present related to them. I was grateful because it felt like he listened to me and took an interest in my likes.
We started dating, and around that time, the group was already on a hiatus. I stopped talking about them a lot and focused on my love life. If anything, I might have had them playing in the background, but I was attracted to my ex the most.
I wanted to be with him doing outdoor activities.
The next birthday, after 8 months of dating, he gave me a jewelry box with my name on it and a necklace inside. The diamonds in the necklace were shaped like the music group's emblem. My birthday present being related to the group again wasn't the only problem.
I don't wear jewelry like that at all. I might wear a thick size leather choker once and a while, but not a necklace like you'll find at Kay's jeweler. If he wanted to buy me any piece of jewelry, he could have gotten me a ring. He asked me what I wanted for my birthday, and I said something personalized. Then, I sent him a picture of a jewelry box with a personal message on it from my mom. The focus of that picture was my class ring , which had personal engravings on it.
Even after we broke up, he influenced someone else to buy something related to that music group for my birthday. By that point, I wasn't a hard fan, so I didn't see it as a good gift. As soon as I got home, I put up in the closet, and there it stays.
What "little thing" made you realize your ex never liked you?
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