优化以下这段英文文本的语法、逻辑尽量采用地道的英文表达让这段英文更地道、合理。文本：When I was a little kid my dream was to become a mathematician To that end I studied hard at math and was a math class representative from elementary school t

When I was a young child, I aspired to become a mathematician. With this goal in mind, I devoted myself to studying math diligently and even served as a math class representative from elementary school through middle school. However, as I progressed to college, I found the level of difficulty in mathematics overwhelming. Consequently, I made the decision to pursue a different major and let go of my ambition to become a mathematician.