Looking for a roommate (Beg of Oct)(Waltham, MA)

Looking for a roommate starting the first week of October 2014. I've a two year old dog that won't disturb you as he stays in my room the whole time. I'm looking for someone who's a non-smoker, clean, organized, social but respects private time as well. I don't mind if friends or a small gathering happens at the apartment as long as I've prior notice. Definitely no couch surfers! MUST be able to pay all bills on time. I'm looking in the Waltham, MA area due to my job.