To Chop or Not To Chop

Back in August, I posted about my reasons for wanting to grow my hair out. I made you all promise to hold me accountable and remind me to keep going because it's for a good cause. Well let me tell you, lately I've really been wavering. I'm in that yucky in-between stage where I wear my hair in a bun everyday, and when I do take the time to straighten it and wear it down, I don't like how it looks. Plus, I have this picture of Keira Knightley tempting me to chop it all off:

So fabulous and chic! I had my hair cut similarly when I started college, and I'm really starting to miss it. Should I stay strong and keep toughing it out, or should I take the plunge and chop my locks?