Most Helpful Guy
Don't fix what's not broken. You have beautiful hair, so it is very risky (and not to mention pointless) to jeopardize that by making a major change.
Trust me, by having long, gorgeous hair, you have a very distinct advantage over most of your female peers.
It's a shame... Everybody cuts it nowadays. Girls with nice, long hair are a rarity.
Most Helpful Girl
Long hair suits you well and it doesn't hurt to change it up a little bit. My hair was a little bit shorter than yours and I cut mine to my collarbone. I didn't like short hair because of the previous cuts I've gotten before. If you like medium length hair on you, go for it. It would take a little less time to style too :)