I'm so sorry she didn't understand!

But I've definitely had that- when I tried to tell my mum she made it sound like all I had to do was start dressing like a girl and I'd 'snap out of it'. I talked to a friend about it once; she's bi, so I figured she might be sympathetic if not understand, but I was wrong. "Well, yeah, lots of girls are like that, it's called being a tomboy!" She seemed to think that I'm just overreacting or trying to find a label.
When I'm asked why I dress/act masculine (which isn't often, people at school tend to just take it in stride which is great

) I usually say that this is simply how I walk, or that mens clothes are comfortable, or something similar to sort of brush the conversation aside. I don't really like talking about it much with people I don't know well enough to predict their reactions.