How do you tell a guy you like him only as a friend?

If you are friends and he is interested in seeing you in a romantic way, but you are not, have an honest conversation. First, tell him that you appreciate it and validate how much bravery it took for them to tell you. And then explain to them why you are attracted to them in a friendly way, and maybe discuss some of the things about your friendship that are really important to you. Let him know that you don't want to compromise your friendship by crossing that boundary, and just kind of reiterate the things that you really love about your relationship as it is.