Bad-tempered

As the time pass by, I feel that I'm gradually having bad-tempered. Bad-tempered, something will make u to regret. When I calm down, I regret for what I did when I'm "hot"... I even blame to myself, why I can't be in controlled? Perhaps I'm too care what been said by others? I forced everyone to follow my ''instructions''? No way!! I'm bad-tempered before and I had managed. Why...this bad habit still come to me? I need some assistance...something will lead me to change my attitude, my habits, my ways to mix with others..