I am furloughed and so is a friend of mine. During the week we chat a lot to pass the time when we would be at work usually.
Yesterday, being the weekend, I didn't message him apart from replying to a few random photos he had sent. He then messaged me goodnight at around 9:30pm so I responded with a thumbs up emoji.
At 10:30 he sent me paragraphs of messages, saying I was rude for not talking to him because he can see I'm online, and doesn't he deserve a 'goodnight' message from me? He said I was impolite, and I have no consistency because I message a lot during the week and not at weekends and maybe I am doing it to test him 
I said he is being a complete weirdo and acting a bit crazy. That I need space on weekends and Also, I'm allowed to be online and not talk to him
he seems to think it's rude if he sees me online and I'm not messaging him.
I've told him now that I'm only going to speak to him during the week, during work hours, because he seems to feel entitled to my time and it isn't healthy.