Learn to control your feelings

Nobody can always happy,if you have something bad,what do you want to do?And how do you feel? I know we should learn to control your feelings,it is very important ,and i think it good for us to understand problem,and we can make friends easily,because terrible heart can make us so bad,so we should have a good heart to face the life,happily to solve them. We must believe ourselves,because we are good!