YOU SAID:
I'm 12 years old and really bored
INTO JAPANESE
私は12歳だし、本当に退屈している
BACK INTO ENGLISH
I am 12 years old and I am really bored
INTO JAPANESE
私は12歳です、そして私は本当に退屈しています
BACK INTO ENGLISH
I am 12 years old and I am really bored
That didn't even make that much sense in English.