5. Say “I want to stay friends with you, so I can’t” and say it with some regret in your voice
“These are my honest feelings so he should understand.” Many men will get the point if you say you want to be friends with him forever. You can also mention that if you do have sex with him you will feel too awkward to see him again. In this case you will encourage him to not do anything that will put the friendship in jeopardy.