I want to go back to the past!

I'm feeling a little sadly these days, and maybe it's because the film made me recall my youth. I liked that time, because it was full of dreams. And We all think that if we study hard the dream can be realized. at that time. And Now I lost my dream though I still have it. [I'm not entirely sure what you meant by that statement.] I want to pursue it, but my ability can’t isn't equal to my emotion. Sometimes I will really regret much the things that I haven’t done. Everyone has his or her own pity regrets. Everyone's life is a drama. Everyone’s life can make others remember the things that has happened before. Someone will cry. Someone will laugh. Someone will keep silent. I know I am young now. [I know that I am still young.] I have time to pursue my dream. I can’t give up, but too much stress makes me can’t unable to breathe. I want to go back to the past, but it’s impossible.