
Don’t feel pressured to tell him if you don’t feel comfortable or it’s not relevant. But also, like #1 said, if he genuinely loses interest because of that he isn’t someone you want to be with. More likely than him genuinely losing interest though, he could become overly cautious or feel as though he needs to walk on eggshells to avoid triggering you, which could come across as losing interest, so you might need to provide him some reassurance as to what you want from him.