YOU SAID:
Don't be sad that its gone,Be happy because it happened
INTO JAPANESE
それがなくなったことを悲しんではいけません、それが起こったので幸せになります
BACK INTO ENGLISH
Don't be sad that it's gone, you'll be happy because it happened
INTO JAPANESE
それがなくなったことを悲しんではいけません、それが起こったのであなたは幸せになるでしょう
BACK INTO ENGLISH
Don't be sad that it's gone, you'll be happy because it happened
That didn't even make that much sense in English.