Change?

Someone said to me that I have changed recently....and for the worse. Wake up call for me I guess. I wasnt even aware that I am behaving weird these days. But one thing I know for sure is that from now on, I am going to make a concious effort to think before I speak or do things and to make sure it doesnt affect the people around me. If anyone of you has been offended by me in someway, knowingly or otherwise, I sincerely apologise.