Chastity and orgasm denial discussion

My wife of 48 years passed away; she at least gave it a go when I asked, though sometimes reluctantly. I have browsed dating sites and attempted to meet new people, yet I am unsure how to locate someone or raise the topic naturally. A worry with these platforms is that if they are active in my community, I fear judgment—I suppose I come off as too timid for such a role. I get along well with my best friend’s widow, but what is the right way to bring up (the slightly embarrassing) subject? I hope not to lose her friendship over it.