Quick question.

So I lost my virginity to my boyfriend (now) and at first we was just doing oral. He loved going on me everytime we seen eachother he went down on me but lately it's like he don't like doing it anymore. I enjoying getting it just like he enjoys getting head. But it's hard cause I love him down on me but it barley does it.. It's like now sense his penis been inside of me he don't like doing it. But at first he did. Ladies I'm confused please help me get a understanding.