求翻译：虽然自己的心无数次的痛，但还是坚强的笑了那么久，因为我时时刻刻告诉自己：没人能了解自己，天下难寻一知己，只有自己最了解自己，不要哭，其实我很快乐。是什么意思？

Although his heart many times the pain, but still strong laugh for so long, because I always told myself: no one can understand their own, the world is hard to find a friend, only know their own, do not cry, I am happy.

Although his own heart of countless times, but still strong laughed so long, because I always tell myself: no one is able to understand more about themselves and the world find it difficult to find a friend, only their own most aware of their own, do not weep, in fact, I was very happy.

Although own heart innumerable time pain, but strong has smiled that the long time, because I tell all the time oneself: Nobody can understand oneself, the world difficult to seek a friend, only then own most understand oneself, do not have to cry, actually I am very joyful.

Own heart many times pain but still strong laughed so long because I always tell yourself: nobody can understand their, all searching a bosom friend, only best known his, don't cry my day.

Despite pain in his heart so many times, but it's still a strong laughed so long because I always told myself: no one can know, world is hard to find a friend, only you know best yourself, don't cry, in fact, I was happy.