I can relate feeling mean when i try to avoid people. I kind of feel guilty when I do that but you just got to do what you got to do for your own safety and peace of mind. There are also polite ways to send a message. Say hello and if the conversation starts being excessive, excuse yourself, any fake excuse would work. If you do it every time, person gets the message. And just because you are home, it doesn’t mean you are available for talking. It’s not being mean. It’s just the reality. Good luck