Hair poll

I am trying to decide on what to do with my hair. I have had it short(er) for almost a year and can't decide now if i should grow it out or keep it short. I am in a wedding next september-- yes a long time away! but think i want it short for then. There is a hair style i like that is short for an up do... anyway. My thought is i can grow it all winter so then if i decide i like it long it will be long for the wedding or if i want it short for the wedding, i can cut it late summer.

Thoughts?!?!? Here are some pictures that might help you decide...

Long:
Short:

Long: (OLDDDDDD Pic)

Short:
Updo i am thinking for the wedding: (Something similar-- my hair is probably 10x as thick!)