YOU SAID:
I was bored so I came here :)
INTO JAPANESE
私は退屈だったのでここに来ました:)
BACK INTO ENGLISH
I was here because I was bored :)
INTO JAPANESE
私は退屈していたのでここにいた:)
BACK INTO ENGLISH
I was here because I was bored :)
Come on, you can do better than that.