Leo Caught Cheating

I live with a Leo female, I'm a Gemini. I found out that she had lied to me and I was hurt, I told her that I didn't like the fact that she lied to me and she said she couldn't understand why I was acting like this it was a big deal and then she left to go back home to see her brother. I hadn't heard from her for 3 days so text her telling her why I was hurt that she lied and that I didn't; like how she brushed it off, that was yesterday afternoon and I still haven't had a text back. Why is she acting like this? I'm so mad that she is giving ME the silent treatment after she was in the wrong. Shall I just leave it now? will she finally text me back? how can she possibly be mad at me, I'm so lost

Help please.

What exactly did she lie to you about?

...She's just a roommate? Why are you acting like you're in a relationship with her? IS this a relationship?

If it isn't, why so emo over it like she owes you answers as if it's a relationship?