YOU SAID:

I love ducks very much to the point where they are my best friends

INTO JAPANESE

私は彼らが私の親友であるところまでアヒルが大好きです

BACK INTO ENGLISH

I love ducks until they are my best friends

INTO JAPANESE

彼らが私の親友になるまで私はアヒルが大好き

BACK INTO ENGLISH

I love ducks until they become my best friends

INTO JAPANESE

彼らが私の親友になるまで、アヒルは大好きです

BACK INTO ENGLISH

I love ducks until they become my best friends