I'm curious to know why you don't want to, what are your reasons? Both of my boys are neutered and I wouldn't have it any other way. I will admit, I was scared to death when I had them done, I posted about this a few weeks ago when my baby, Oliver, was done. They wanted to keep him overnight at the vet and I protested because he would be alone from 6PM to 7AM. And they said it was to keep him there for observation! I did win and brought him home that same day
The spraying CAN be a problem. You might not notice the smell living in it, but visitiors to your home will! And trust me.. they will comment on it! Every once and awhile a person can get lucky and own a boy who doesnt spray except maybe in the litter box, but kitties like that are few & far between.
I think your boy would be happier in the long run if you had him done... he could spend more of his time loving you & playing instead of spending his time crying because he can smell that female in heat 1/2 mile away!
My oldest male still "gets a little" when my female goes into heat (she is being spayed soon), even though he is fixed, he still figured out what to do..well sorta. He just lays on her, but she is content with that.
But I think he does it just to get her to shut up...lol. He never goes to her, she always goes to him!
My vote is to neuter, if you are taking a poll! It's the best thing you can do for your little man!