Well, it’s clear he doesn’t want just friendship and it’s clear that you don’t want any more than that…..all those red flags ☹️ already.
You’ve a home, friends, interests, a routine. Surely allowing a pushy old guy to call the shots regarding hope for coupledom and life-sharing doesn’t appeal, cos you wouldn’t be asking on this thread! You’d know. You could go to the cinema, theatre, Pub, out for supper now and again with any nice guy with better manners and more respect. A day out, maybe, some fun, a nice easy friendship, no demands - then home to your own space, without extra future complications, responsibilities or pressure.
He’s put you off and IF you still have any interest at all, it’d be better to say directly that friendship and the odd outing is a possibility - but no more than that. Sorry! Unless he’s risking more trauma (and there’s no fool like an old fool), he probably needs to listen now, act his age and not his shoe size and focus on sorting out his own life - not try to take over yours.
Good luck, but I think you’ve got this covered!