I don't think you needed to apologize to him after he blew off your 4 phone calls. Why apologize, when he was the one dismissing and ignoring you? And he ignored your text after ignoring your 4 phone calls, explaining yourself. Yet, you persisted, and still contacted him two more times after that. That was your mistake. He sent a clear signal that he did not want to pursue things, yet you persisted and persisted, then it blew up. I would have walked away the moment he began blowing me off.