My cousin makes everything a competition?

I have this cousin who's a boy, in a girl. Ik it's pretty unusual for oppisite genders to compete but my cousin makes every single thing into a competition! He always has to try and be better than me and it makes me so mad. For example I got an iPhone 5c and than a week later he had to get the 5s. I got a lifeproof case for my phone and so did he. I know he's trying to compete because every freaking time I get something he has to get it right after. Another thing, I lost weight and than he had to of course join a gym and lose some weight him self. I'm sick of it! Comment what you would do and no rude answers please.

It sounds like you're the trendsetter. Let him follow, and don't make a big deal out of it, unless he starts trying to put you down (for whatever reason).

I have a friend just like that. He gets on my nerves so much sometimes, but i've found ways to deal with it. In my opinion people like this are jealous and want to be like you.

Diferent ways to do it: 1 straight up say you don't care, and why you copying me.
2. B.S him, say thats great, mine is also simliar to that, or i did that first and i'm glad you are doing it also.
3: just don't care, if he copy's you or shows off, say thats great sarcasticly and ingore it.
4. You could be sympathetic to him, cuz most people like this have confidence issue and try their very best to be better materially. Just be nice and don't let it get on your nerves.

:) hope helped a bit.