Notes to take:
1: They are talking, they are annoying. Tell them to go shove off.
2: They are not the government in a communist nature... You DO what yo want, they can't make you do anything.
3: You are your own person, not anyone else's, well unless you have a boyfriend/girlfriend/husband/wife, but then again they should be caring and accepting.
4: You are not in any armed services, therefore they cannot make you cut your hair.
I'm not so lucky, I am in the Army, well at least the reserves, so I literally can't do much of growing my hair out. But it doesn't mean, even though sometimes it is really really short, I cannot style it my own way, in which gives a feminine look.
Try not to let them get to you, possibly in a case of standing up for yourself and not caring what they say, they may even stop chattering nonsense.
Kate <3