Casey does kinda seem like a lesbian
I mean she does dress like one most of the time, especially when she wore that striped polo shirt, shes just always wearing something very boyish. Shes not very girly at all, not saying every girl like that is a lesbian but in this case it kinda makes sense for Casey.
She dresses like a boy and is very athletic, just saying its not so far fetched that shes maybe becoming a lesbian.