You can save your money and move in your own place. Or just do it when they are not home.
Forget about it, clothes only make a difference in your Mind. Your Life will be much Simpler if you don't give in to Silly Whims.
You might grow out of it. Looks like you are in your early teens, which is an age where it is normal to experiment with every aspect of sexuality so as to discover your preference.
Wear your mother's underwear.
Wait until you are old enough to move out on your own, then you can do whatever you want.
Go to dinner in full female regalia. Get it out in the open and force them to confront it. Tell them "This is real. And this is happening."