Again, be grateful for the honesty. However, this is a serious issue not to be taken lightly. As hard as it is, I would let him go, at least for the mean time. He needs to KNOW how he feels and KNOW that he only has those feelings for you. The main point of this is do you really want to be with someone who MAY have feelings for an ex. The truth is, you deserve someone who knows without a doubt they only have feelings for you. Why settle for anything less.