I (mid 40s straight woman) literally have never had this happen to me (a man wanting to be my close friend but having no sexual attraction to me, and it’s not as though I’m all that), but I am in a running debate with my SO about whether it is possible for a heterosexual man to spend significant time and energy in a personal life context on a straight woman he doesn’t have some type of designs on (or she on him). Now, I have had male acquaintances who I saw regularly at school or work who I spent some amount of time with by dint of circumstance, but I’m talking about something like a long-distance friendship in which there is texting, phone conversation, and an occasional visit. In my opinion, that sort of relationship is by definition not wholly platonic even if it is mostly platonic or even if it is 100% platonic on one side. Change my mind.

ETA: does the relationship status of the two people make a difference? What if they once hooked up while drunk?