Is it rude to not open a gift in front of the person who gave it to you?

I literally spent WEEKS researching the perfect gift for my friend, and I finally bought something that I thought was absolutely perfect. I was so excited to give it to him and see his face when he opened it. But when I went to his house and gave it to him, he put it aside and didn’t open it. I thought that maybe he didn’t want to open it in front of an audience (he had another friend there), so when I was about to leave, I asked him if I could take it and bring it back at a better time. He told me I was being immature, and that I couldn’t just give someone a gift and then take it back. I thought he would pick up on how I was feeling hurt by his reaction, but obviously he didn’t. So I was wondering, it is rude of him to not open it in front of me? Was I being immature by wanting to see his reaction? Should I just get over it and pretend like it didn’t hurt me? I hate feeling like this!