So yesterday with my boyfriend

I was with my boyfriend yesterday and I gave him a handjob and he came on his stomach so trying to be a good hot girlfriend I licked it up and swallowed it. When I looked up at him he was giving me this look like he was repulsed so I was like "Why are you giving me that face? Isn't it supposed to be hot?!" And he was like "yeah but I was imagining myself doing that for you and that's disgusting." I felt so embarrassed I didn't know what to say. I got up and brushed my teeth but now that I'm thinking about it I'm still embarrassed. Any thoughts or advice to give? Please help!