Haircut

So I have been debating on if I should cut my hair out not. It is about halfway down my back now and if I cut it I am going all the way. I want to do it because it is heavy and it gets on my nerves. And it would be easier to deal with when clinicals start back up for school. But I don't want to cut it because it has took me years to get it this long and last time it was short my face looked fat. But I have lost weight since then. So I am still torn. I may end up doing it for my Halloween costume anyways.
 This is the style I am thinking about getting if I cut it short. Thoughts?