Am I weird for being a fan?

All my life I have been a huge fan of Harry Potter, rereading the books, watching the movies, listening to soundtracks, and buying some merchandise every now and then. Although the rest of my family are casual fans of Harry Potter, they never understood my love for everything related to the series. So I kind of had to learn to keep all of my fan excitement in, because anytime I wanted to bring up some recent HP news, my family generally has nothing to add to the discussion because they have only watched the movies once, so I kind of felt like I was an outcast for being a big fan.

I am also a fan of singer/songwriter Haley Reinhart. I have been listening to her ever since she was on American Idol in 2011, and I think she is incredibly talented. Now, she is running an Indiegogo campaign, and I wanted to contribute $150, to not only help her out but get a cool thank-you video out of it for myself. I know it is a good sum of money, but the only thing I ever buy for myself is food so I was open to doing this. I told a family member about it today and she immediately was negative toward the idea, saying she is not gonna give any money just because I am "obsessed" with this singer nobody cares about. She then says that my mom will probably say the same thing.

I know they aren't fans, but this makes me feel that I'm a loser for caring so much and wanting to contribute. They make it seem like I am crazy for wanting to support this. Time is of the essence, what should I do?