I'm heartbroken 😔

Last night my boyfriend and I had sex , but he didn't finish . He had ordered pizza and instead of his brother just getting it , he knocked on our door and slid the ringing phone under the door and that just completely killed the mood . Later my SO told me that out sex life sucks . I didn't know what to say . I cried and just decided to go to bed . What do u say to him we have been together for almost 3 years and he has never said anything like that to me .