What should i do about my farting problem with my boyfriend.?

so i was in my boyfriends room and we were on his bunkbed and his younger brother sleeps on the top so we were just sitting on the bottom one while his brother was asleep i dunno what happened but something inside of me bursted and i let out a loud fart i tried to blame it on his brother and it seemed to work but when he was walking me to the door (when it was time to go) we saw his brother asleep on the couch downstairs. do you think my boyfriend is really grossed out now? do you think he is gonna break up with me?