Re: How to Say No
Harassment is defined as: to disturb persistently; bother continually; pester.
Although it may not be harassment in your eyes, by pure definition it is and the rules of the dojo (like any business) should have a clearly stated harassment policy.
I would agree with some advice previously stated: tell him to stop and that if he pushes one more time you'll immediatley inform the instructor. Tell him this firmly.
You have to look at the long term...it will eventually effect your training, his training, your sanity, possibly both marriages if the wrong message is overheard by eavesdropping ears, and potentially the training of others if you are consistantly distracted.