Can ex friend enter my home even though she has house key?

I let my friend live with me for almost two months. We recently got into a huge fight and I told her to leave. She wouldn't come get her things right away and still has a house key to my house. I have stored her stuff outside in a storage unit, but she still thinks she can come into my home and "see for herself" that nothing is still there. Her name isn't on any legal paperwork, I live onsite where I work. I'm just curious if she has the right to enter my house??