Have you ever met someone

So sexually in tune with you that it constantly draws you to them? My ex was the same way. Amazing guy, but us being in a relationship was horrible compared to us being close friends (with benefits). I have a boyfriend and I love him dearly to the point I kinda wish sex didn't matter in the relationship, because this guy just works with me sexually so well. I'd never cheat, and I know I'm a bad person for letting it cross my mind, but it's difficult. Anyone else deal with something like this?