Grossed out by my partner

Does anyone ever feel grossed out by their partner when he’s kissing them or during intercourse? Why do I feel like this? I’m so confused! I feel like I don’t want him to even touch me but I do it anyway to keep him happy. There is nothing wrong with his appearance I feel like this is a deep down feeling. Help. Have you felt like this? Is this how it feels when the love has gone?