The hardest part here is figuring out what is defined as long and short hair.
I'd say, FireFly, that your current hair length doesn't strike me as "short", and certainly does not give off a lesbo vibe.
From my personal view, I am of the group that thinks "the longer the hair, the better." Short hair doesn't scream lesbian to me, but it doesn't attract me either. And by short hair, i generally mean this length:
I saw a girl over the weekend who's hair went near to the back of her knees. She must have one heck of a strong neck...