Do you feel that he wants to keep you as an option?

Does he feel guilty about the break up and thinks being friends will 'soften the blow'?

Do you feel he wants to keep you as an emotional stop-gap to get him over the break up while he finds someone else?

What do you want? Do you genuinely want to be friends with this guy? could it work platonically for you? Will it enhance your life? Or, will you always be wondering whats going on, who he's seeing. Will it hamper you moving on and your growth?

Be honest with yourself and choose what works for you. You are the most valuable thing in this equation. Nothing and nobody else.

Good luck friend.