correct my diary please

When I was a senior high school student,*I met a boy like me, who did all things in a careful way,and who wanted to become stronger , day by day.  I told him we  could take the exam for the same university because of our same interest in business. So everyday we worked hard to learn many things in English, math, chemistry, politics, l biology, Computer Technology and physics. We had never gaveup,

One day after school we went  to the fish shop, and through the fish glass (UNCLEAR)I saw a pair of eyes I had never seen before, At that time I knew I perhaps liked him by mistake. (better: I understood that perhaps I was mistaken to like him)

,And because of his foot ached/was hurting him, we went home by bus (we took the bus home).That night I felt bad (I didn't feel good) and told my girlfriend but nothing happened.   Still....

a senior high school student - not precise, and ambiguous.  Use:
When I was in high school (any of the last four years of schooling before university)
OR
When I was a senior/when I was a high school senior (last year of high school)