"I wanted him to wear a helmet and quit smoking" is a tiny compared to "He cheated on you and left."
Yes, insisting he wear a helmet was controlling. It would've been better to tell him you prefer he wear a helmet for his safety, or that you won't ride with him because you don't want to see what happens, or you won't let the kids ride with him because you don't want them to see irresponsible behavior.
Originally Posted by KitCat
My H is a very competent adult - my trying to manage his health was completely disrespectful.
Most teens understand the value of seatbelts and helmets. His life, his choices though.