I love my sister, whatever happens i share with her. she too does, but yesterday i found that she hide some things, knowing that i feel bad, help me.

Give her space: It is hard to answer because there are no details so this is in general. Sometimes we are so close to someone that the boundaries are blurred. Where does my sister start and i stop? As we grow and mature the boundaries become more defined and it can hurt because we feel like are loosing control. There are things that a good loving sister may not want to share with her brother. She has that right.