I absolutely agree with Cassie with her advice to Beeconeofhealth. No bucks unless you are serious about breeding and have a buck with papers who is worth charging a stud fee for!
They will make your property smell terribly, they urinate all over their legs and beard on purpose to increase their smell, and if you want your doe for milk-- keeping a buck who is not far separated will make your milk taste bad and generally be unusable for anything but making soap...maybe... if your lucky.
Since you already have the buck and perhaps have fallen in love - don't despair. Call your vet and discuss castration. A castrated, descented (they burn the smell glands that are strongest at the top of the head) male is a wether and they make excellent pets. I keep one around here most of the time. They are so lovable the neighbors actually come to pet and visit them and prefer their company over that of the does.
I also have my boys disbudded as well for the safety of all. Again, if this has not been done talk to your vet ASAP.
The younger he is when all of this is done the more likely it is you will have a positive outcome.
BB