Toby and Kevin the invisible

In class we have to invent a story of 200 or  250  words. At the end of this story we must put "And that was the last time I saw him/her", here is my story.

There was a time, two good friends that were always together playing. One day, one of the children called Toby, got a new train for chritsmas and ran very quickly to Kevin's house to play with him, but Kevin wasn't there. Kevin's family was crying and Toby doesn't understand why they were all crying. Kevin's mother told Toby to have a sit. When Toby was sitting on the chair the mother told him that Kevin disappear. Toby started crying and went out of Kevin's house and threw the train away. The years passed and Toby grew up and started thinking about other things instead of Kevin , but he never forgot him. Toby was about to graduate from school and he started looking for options of universities and he found that was very interesting and good for him, so he went there. Toby was on the first day of university, he was so happy because it was the first time after years that something good happened to him. He was on the second trimester and a new boy entered his class. He was indentical to Kevin. Toby got surprised . In the breaktime Toby went and talked to him and he discovered the boy was really Kevin. The next day, Kevin started talking about a best friend he had when he was little, Toby talked about the same. Time passed and they were feiends and one day whith any explanation Kevin dissapear. That was the last time Toby saw him.