Relationship troubles

So I know this topic doesn't exactly fall into the Love & Sex category but I didn't know where else to😁 but I have this friend and he want to be more than friends and I said I did too, but then I realized I'm not just sexually attracted to him and I don't know how to explain to him that he's a great guy and I like him a lot as a person but I'm not sexually into him.... I really don't want to hurt him