YOU SAID:

I've never watched fireworks alone with a girl before!

INTO JAPANESE

私は前に女の子一人で花火を見たことがない!

BACK INTO ENGLISH

I seen Fireworks at one girl before!

INTO JAPANESE

一人の女の子の前に、で花火を見た!

BACK INTO ENGLISH

In front of one girl, watching the Fireworks!

INTO JAPANESE

一人の女の子の前で花火を見て!

BACK INTO ENGLISH

Watching the fireworks in front of a girl!

INTO JAPANESE

女の子の前で花火を見ている!

BACK INTO ENGLISH

Watching the fireworks in front of a girl!