Guess the tone

He called me when I was at school. It was my friend. My mood was lifted but at the same time uneasy. He said when I would be able to attend taekwondo class again and I said June. He said that I must come. It was summer soon after, but a week passed and I wasn't there and another week passed, and another. The days passed by until summer ended and I was back in school, wondering with a feeling 0f lonliness. I looked back to that time and thought: Its not like taking that class would be spending a day and plus, I had saturday and sunday. Why didn't I attend? If I had, than I would have experienced friendship. But now its just to late, he probably would not consider me as a friend again.