Here is a scenario that actually happened, you’ll be the judge:

Person A is someone who, to their own admission, wanted to be friends. I know them over persons B and C, long-time friends of mine, A is very close to B. I invite A to a BBQ at my place that B and C are attending as well, they leave me on read, but tell C they’ll come, so when speaking to C shortly before the BBQ, I get told that A is coming as well. A then asks if they can come too even tho I already know they planned to come. I brush it off as bad communication.

Next month, pretty much the same situation. I invite A, this time telling them that they should drop a yes/no so I can plan for food. Get left on read again. At the day before the BBQ, I ask again if they’ll come, they say no. Next day A asks if they could come despite saying no, okay well whatever. Anyway B and C arrive first and they know that A is coming too. They were told a week ago, I had no idea. Got me pissed, I text A and ask what the fuck their deal is and now suddenly I am the clingy bad guy. B remains neutral, C takes the side of A telling me, it was my fault that it didn’t work out and that A was simply trying to surprise me.