I'm scared of my brother after I found out he is spying on me
Are there reasons that would make you feel that way?
Because he had done the same not too long ago
That is a mean thing for your brother to do. You should communicate how you feel with your siblings. They should respect your boundaries and let him know to stop.
They only did that because they love me.
I'm sorry that this is happening to you. You should try and communicate your feelings with your sibling. They shouldn't be trying to spy on you and making you feel uncomfortable.