As the only child in my family, I have been doted...
No need for comma after "here":
Without any regret, I came here and adapted to the new life easily.
...told me that my grandfather was getting more serious; in other words, my grandfather
was dying.
Of course, to go back and see him for
the last time would be the responsible thing for grandson to do; however, dropping school for such a long time was not appropriate action for an international student to take. Eventually, my grandfather talked to
me and told me not to go back. So, my parents and I followed his idea, and he passed away soon after that.
At the end, you make a very wise observation about gratitude! I think you should also acknowledge, at the end, that the decision you made was the incorrect one, and you should say that you want to achieve great success in college so that the sacrifice your grandfather made by encouraging you to stay in San Francisco will have been a fruitful one.
Sorry for your loss! Press on...
Kevin, EssayForum.com