emotionally unstable

After finishing today's work I met my friend. Well, actually he was at the gallery I work for during I was working because he came to see an exhibition the gallery has been holding since last week. That was the first time for him to visit the gallery and he said both of the place and exhibition were interesting. I wanted to introduce him to the gallery's staff as he is an artist as well. However, unfortunately, it didn't come true as no one was there at the moment. That was a shame though we had good time anyway. As the matter fact is that, we met when we were at the university, about 7years ago but we had never talked much like tonight. Even there were about 7-year-blank, we were close enough to enjoy communicating each other. It might sound odd but it happened.