Sometimes the rule isn’t “Do unto others as you would have them do unto you.” Sometimes the best way to interact with a person is to imitate how they are interacting with you.
Imagine this – if they are working on the premise of “do unto others…” then how they are interacting with you is exactly how they would like to be treated. So if your way doesn’t work, try their way.
If they stand too close, try standing close to them when you initiate a conversation. If they only talk standing up, try that. It may make you feel uncomfortable, but it may help them feel comfortable. If you keep communicating with them your way and not their way, they may feel like something is wrong. These unwritten rules of social interaction are often what make or break a conversation.
Just like different cultures have different conversational styles, so do different people. To make someone feel comfortable, try doing things their way – not yours. Often, it isn’t what is said, so much as how it is said that makes the conversation work or not.