YOU SAID:

You are so fun, you will always be my friend.

INTO JAPANESE

楽しいので、私の友人ができます。

BACK INTO ENGLISH

A friend of mine because it's fun.

INTO JAPANESE

私の友人は楽しい。

BACK INTO ENGLISH

My friends are fun.

INTO JAPANESE

私の友人は、楽しいです。

BACK INTO ENGLISH

A friend of mine is fun.

INTO JAPANESE

私の友人は、楽しいです。

BACK INTO ENGLISH

A friend of mine is fun.