Yep you can't say you don't want sex with him and then be naked with him. Can men and women be platonic friends? But if there has been a relationship or theres is sexual attraction then it is hard. Being naked with the opposite sex ( or same sex come to that if you are gay) is fine for little kids but sends out mixed messages if you an adult ( unless it is a changing room i guess). Help him with his depression but not in that way.