YOU SAID:

he was 23 and I was 13 going on 30

INTO JAPANESE

彼は23歳で、私は13歳で30歳でした

BACK INTO ENGLISH

He was 23 and I was 13 and 30

INTO JAPANESE

彼は23歳で、私は13歳と30歳でした

BACK INTO ENGLISH

He was 23 and I was 13 and 30