请帮我看下这篇短文有没有语法错误或者用词不当，哪些地方可以改成更高级的词或短语

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Today I went shopping with my friends. We hadn't seen each other for a long time, so I felt very happy.
We saw the film called“Line Walker”together. It was a wonderful film. After the that, we went to the gaming hall. We had a good time there.
Time flies when you're having fun. The rest of the day had past so quickly that I felt a bit sad, although I enjoyed playing with my friends so much, and that was the most important thing.
Even if we are physically separated from each other, our hearts are connected together. I believe that we will reunite again someday in the future. So let us silently wish happiness to each other for now.