what if i fall for my best friend

i'm big. y'know what i mean.
i'm a girl, but i'm 6'2 and 200 pounds. you could say i catch attention, but that's not really something i care for.
i only care for one person, ever. her name is Catherine.
everyone calls her Cathy because everyone loves her.
including me.
she's my best friend, too. we met back in elementary school, and we've clung to each other for years- well, it was more of her clinging to me. as i mentioned, i'm big.
but i protected her.

but for some reason its different.

we entered our last summer vacation- the one leading up to being a senior- and everything was changed.

people started to tell her they were in love with her.
that they understood her, like i did.

but they don't, and they never will.

it makes me angry. so angry.
so big and angry.

now she's scared of me.

now i'm too small.