[Lucid:]

Do NOT be a friend with benefits. That is so disrespectful of him to even ask that of you after hurting you so bad with the breakup earlier this year. I personally would cut off all contact with him after hearing that. If you want to try and continue a friendship with him, that's your call, but I think for both of your sakes you cannot let him even entertain the idea of getting back together sexually or romantically, at least for a good long while.