What to do about over controlling roommate?

I met my roommate at school we had a class together and became friends. It was great and we had a lot of common interests. Sooner or later we moved in together and I started seeing a different side to her. She is always asking questions and wants to know my business. If I get a package she wants to know what it is. She keeps pestering me with texts and face to face conversations and asks me if something is wrong when IIm quiet because she thinks IIm mad at her. When the only thing making me mad is when she keeps asking if I'm mad. IIm a quiet person and only speak when I need to. One day I got out of the shower (we have our own bathrooms) and got a text from her while she was in the other room with her stating that I was in the shower for too long. One day I left a bowl in my room in a hurry to go to school and she went into my room without my permission and took it. She did the same thing when I was at my boyfriends house for the night and took my iPhone charger without my consent. I think it's rude and unacceptable for her to go into my room at all because it's my room and I pay to live in it.

Wow how rude! You need to tell her to back off!

Put a lock on your bedroom door, lock it when you leave.

Then you need to talk to HER about it, not us. We can't help you. You need to find a way to talk to her without turning it into a fight.