According to the official twitter account, the second season of Boku wa Tomodachi ga Sukunai was announced to be aired from January 2013.
Haganai official website
Trailer for the second season
Source: Haganai Anime official twitter account
Nedeed more Sena <3
MY BODY IS READY!
We walk with empty smiles plastered on our faces.
Because now is only now. And this moment...is so precious.
<+Cherub> I'll start fairy tail
Finally!!! All of my love for you Cherri! <3