Friends with benefits with an ex

So there’s this guy that I used to be a “thing” with we stopped talking for almost a year and I still had feelings for him the whole time and still do. We have decided to be friends with benefits which is a mutual decision. I asked him if he had feelings for me while he was drunk he said “yes but idk what” he knows I feel the exact same. He is very very stubborn and I asked him today while he was sober and he said he doesn’t have feelings but then admitted “I don’t know what I feel” as he agreed what he said the other night is “true”. Advice?