Our sex

Okay so I have a high sex drive and me and my man usually have sex 8 times a week. But for this whole past week he hasn't had sex with me. Idk what's going on. He is a very honest person and I don't think he's cheating because he would of told me there was someone else. But we're still with each other everyday all day. Still do amazing things together all day everyday but we haven't had sex. I'm kind of afraid to ask him about it because I don't want him to get the vibe that, that is the only thing I care about in the relationship. But you ever been curious and just got to know something. Yeah that's me because I tend to overthink a lot and 99.99% of the time it's nothing. So what can anyone tell me?