Does my crush only see me as "little sister" material?

He calls me adorable a lot and cute sometimes. He's seen me asleep often and tells me I look like a little kid when I sleep. I'm 5' 5" so I'm not petite. He's barely taller if not the same height as me and he's only a few months older. "Adorable" doesn't really seem to suit me coming from him. I feel like a little kid or a dog when he calls me adorable :\