Today, I found that I made a serious mistake. I was so careless and I feel terrible today{:soso_e109:}. Although, my teacher didn’t accuse me, but I will reflect myself. Never have no any mistakes next time.

go ahead!! Go go go {:soso_e130:}

"Never have no any mistakes next time." Seriously!? double negative?

Never say never.

No any mistakes? as we live, we can't avoid them.

"Next time", maybe "in the future" you mean? or the same mistake won't happen again.

"Although, my teacher didn’t accuse me, but ..."Seriously!!"Although... but..."

Don't think I mean.Seriously, I like you as you are thinking.