Oral sex end up my relationship

I'm feeling so down, I meet this guy, his very nice but different to any guy I ever met. He gives me the best sex ever we go 5 times so easy and so pleasurable. Last time I had sex with him I was in my fertil days and I know he wouldn't cum inside, so I was on top and decided do give him an oral sex, when I hear him said that's nasty,but I didn't stop, I was so in to him, and he said it again I can't believe you're doing that, I felt so ashamed,I get up shower and went home. He was mad bcz he didn't finish, I couldn't do anything else after he made me feel dirty , just bcz he was inside my V and I licked him.