LOL, Sandy...locked your cat in the bedroom...!

Seriously, though, I guess if you are comfortable with it and it is fulfilling a need or desire you have with this man, with whom you have a longstanding Internet relationship as a friend, it seems okay.
You have stated you are alone. Is this fella alone also? I hope not married, though I suppose under certain circumstances even that could be sidestepped, though there are moral and ethical issues if he is.

Like Bebop, I couldn't do it, though I often find myself lonely these days. Maybe if I had a longterm friend like you, I'd feel differently.
Patty