How do I be more feminine without it being fake?

Hey I have the same question:/ My personality is more like a guys i guess you could say. My sister is more feminine, I mean my goodness scream over the most stupid things!! haha Ive often envied her but I guess people like us just gotta be kinda tomboys:) not really anyways my suggestion is do it slowly. Just start doing things more girlish. Scream when ya see a daddy-long-leg and so on!