Communication is vital.
If she violated your space, you need to tell her that, in a way that won't make it seem like an attack.
Long story short, if you're shutting her out and refusing to communicate, then: Yes, it's you, and yes, it will always be like this.
Gralson: my husband (works out of town).
Auto: my girlfriend (lives with her husband Zoffee).
The most dangerous phrase in the English language is "we've always done it this way."