My best friend keeps invading my privacy!!!

I have this girl friend; we've been friends for like 15 years now.She’s my childhood friend; we were raised together; our families are friends, and I really love her. Needless to say, we’ve been through a lot of things together.But here is the thing: since we became adults, she keeps invading my privacy, even though I was very clear about my boundaries. For example, there was this one time when she was moving places and her place was not “liveable” yet, like she said, so I invited her to stay at my house, and guess what? She stayed for 3 months!!! I was not bothered by the idea of her being around for that long, but she kept disturbing me with her behaviour.She was wearing my clothes, ruining them and leaving stains.She was eating all of my food, leaving me absolutely nothing, and using my stuff without asking (I don’t even allow my biological sister to do this).But I didn’t say anything after she moved to her place, which is pretty close to mine. She proceeded to ask to stay at mine over and over, and I just came up with excuses every single time. Then she stopped, but it didn't actually stop here.She treats me like I don’t have a life or friends other than her! Whenever I feel like I need some distance or mental break from everything, she keeps on calling and texting me and my family a lot.I’ve been distancing myself from her for two months now, and I miss her. I miss her company because we have a lot of memories and everything, but I’m really afraid to talk to her again because she does all of those things again.