The world has enough back yard breeders.
Is your dog a good example of the breed? Have you had the proper genetic tests done to ensure he will not pass along any bad traits? BAER, CERF, and Patella (OFA) examinations?
There are already tons of bostons in rescues waiting for good homes. Don't add to the population. Leave the breeding to the professionals. Why not get your dog neutered? It's better for his health and temperment.