['My close friends promised to have a dinner together last weekend as we planned out. But after calling him several times, he did not respond or even call me back at all', 'Oh that is quite strange, I hope nothing has happened to them.', "I don't really know. He just stopped answering the calls. I am very disappointed at him being so irresponsible"]
Yea, I would find that rude as well, if he cares about the relationship he should apologize or make it up.
My close friend promised me to meet last weekend to have a dinner together. But after calling him several times, he did not respond to me or called me back at all