ideas???

ok so the guy i have a thing with is leaving off to college within the next 2 weeks to england (we live in belgium) and he plays american football for his school and has his first game on the 21st and i want to go to support him. he said if im able to come i should stay the night and crash with him since it takes awhile to get there from where i live. obvi i want to spend the night w him, im crazy about him. but how do i convince my parents to let me stay?? they dont know that we’re a thing, but i think that they can tell that i like him. i know i could say the obvious “his mom and sister will be there too” but do you guys have any other ideas on an excuse??