YOU SAID:

I am bored and that's why I have reached here

INTO JAPANESE

私は退屈しているので、ここに着いた

BACK INTO ENGLISH

I got here because i am bored

INTO JAPANESE

退屈だからここに来た

BACK INTO ENGLISH

I came here because i was bored

INTO JAPANESE

退屈だったのでここに来ました

BACK INTO ENGLISH

I came here because i was bored