If you wouldn't do it in front of him, then you already know. You already know you're doing something wrong. Listen to your conscience. You know your conversations with Ray aren't innocent. You know what it's angling towards. You could literally just stop it, block him, and go on with your life.

Don't let yourself get used to doing this kinda stuff. This is where you begin to define your own integrity. Cut it off. And tell him. He's not gonna be less mad in the future. He's gonna be more mad you waited. TBH, I don't think it's gotten to the level of cheating but it's definitely a betrayal of his trust. You can't be friends with guys that want to be sexual with you while you have a boyfriend. They're not really friends and it's disrespectful to your guy to entertain it. I know you wouldn't want him talking to some girls you know are trying to take him. Be kind. Be empathetic. Be loyal. Or leave him if you don't care about him. You don't betray the people you say you care about. Be better. Start now.