I am 16 going on 17

Is it weird that I like to hang out with my niece that is almost 16? I actually hang out with her quite a bit, but I don't think its all that weird. Its really nice hanging out with someone that thinks you are the coolest person in the world. Every time she comes to my house she ends up cleaning something (I don't make her), we shop where I like to shop, she helps me cook dinner and cleans up after, did I mention she thinks I am the coolest person in the world?