My cousin copies everything I do?

She just turned 12 and I'm turning 15 in two days. She literally copies EVERYTHING I do. Whenever I dyed my hair red, two weeks later she came to church with red hair. When I got my iPhone 4, for Christmas she got an iPhone 5c. I got Baby Lips lip balm, so did she. It's so annoying! And then it's like she tries to be me, but better. A better version of myself? Wtf. She's a spoiled brat. She gets whatever she wants and she acts like she knows everything. She's been doing this since I was about 11-12. I thought it would wear off as she got older but it hasn't! It's gotten worse! I once told her about how much I wanted to be a cheerleader and she said it was stupid. A few moths later, she joined cheerleading. I just recently dip dyed my hair red and when she saw it, she talked about how much "she loved it" and how she's "wanted to do that to her hair for a long time" and she called me today and told me she was doing it. I was so mad about it that I just hung up and ignored her texts and calls. I know it seems childish but she makes a competition about everything! And she brags about all the stuff she has all the time cause we don't have a lot of money and she knows that. What do I do?

Sounds like my old friend. I'm 26 now. We sort of drifted. I regret it now. Anyway, I know it's annoying but what I learned is the more you make big deal out of it the more it becomes a big deal. Lol YOU know what she's doing. Why does it matter after that? If someone thinks you are copying her then let them because they are wrong. Enjoy while she's still copying you man because when you get older it's going to stop quickly. Plus, you're older… Lets see her try and copy you when you get your own job and license at 16. Doubt her parents would buy her a car at 13 and if they do it's illegal for her to drive it. She looks up to you but too proud to admit it. Let her. It's flattering.