Most Helpful Guy
It shouldn't take him long once he actually feels it in his heart.
If you just want to hear the three little words and you don't care if they mean anything. . . there are plenty of young boys who will tell you that anytime you want to hear it; all you must do in return is to pull down your panties. . . but I'm guessing that is not what you want.
Most Helpful Girl
As long as he needs for it to be real. Could be a day could be a year.