You'll have a blast there on a log. Wish I'd had one when I was there, I'd have surfed every day.
Guest houses are open year round. I'd say "not too busy". It is on the non-surf travellers map too though, so there will be people about.
There's a cafe right on the point, and your Girlfriend can hang there or just out front from there with minimal hassle. My partner doesn't surf, and that's what she did. She may get some hassle away from there if she's on her own, but I'd say overall the people were very respectful. Not as bad as the west coast, or India.
Have a cracker