Missing a guy friend

I'm in a relationship, living with my boyfriend, but I can't help but miss one of my old guy friends (we were fuck buddies on and off for years). I miss just talking to him. Me and him use to laugh so hard all the time. He always gave me the best advice and really cared about my problems. I would love to get his advice of some of the problems me and my boyfriend are facing. The thing is he always seduces me every time we are alone together and it's nearly impossible for me to resist him. So it's hurts knowing I'll probably never see him again, but if he were to ask idk if I would decline 😰