I love my grandma but..

So, my boyfriend usually goes to work out of states and I’m alone at home. So my mom asked my grandma if she wanted to stay with for a couple of days so I wouldn’t be alone and of course I was fine with it, she’s my grandma. But it’s been 6 months already and I’ve had it. She’s a hoarder and I’m an extreme clean freak. It’s gotten to the point where I’m not even happy anymore. I’m always so grumpy bc the house is always messy. The house can NEVER be clean. I can clean and clean and the next day it will be a complete mess. She has her own house, with a kitchen, her bedrooms and everything else. But me and my bf just want to have alone time to ourselves and my grandma is constantly getting into my business. How do I tell her without sounding rude? I love her to death but I can’t anymore. It’s literally draining me.