I’m sure he knows.. if he’s really oblivious TELL HIM?! hiding things in a relationship isn’t good big or small and honestly stuttering is a small issue (coming from a stutter). Once you tell him he’ll understand it’s this thought of judgment us stutters have every second of a social situation where if we mess up the other person will laugh to avoid being laughed at, point out the problem if you’re hiding it and you start stuttering that’s when people laugh bc they’ll think you’re nervous or hesitant or having an awkward moment when in reality you just have stutter lol people will understand and you’ll feel much better about it and yourself once you stop hiding it