This is a regular verb. It follows the conjugation pattern of the verb vivir.
Present:
Me aburro cuando no tengo nada que hacer.
I get bored when I have nothing to do.
Preterite:
Ayer nos aburrimos en la reunión.
We got bored at the meeting yesterday.
Negative Imperative:
No se aburran; ya casi terminamos.
Don't get bored; we're almost done.