When she 発言しました your not aloud to like boys, i think she meant your not aloud to like boys from your SCHOOL! または your not aloud to have a boyfriend または summat.. but i think she would be cool with あなた liking One Direction, 'cause its not likely that 1d will come walking down the 通り, ストリート to buy clothes from H&M.... that's not even rare..
I'm pretty sure she just means あなた can't like a boy from your school または something like a boyfriend. And yes I know all us Directioners like 1D as husbands but I don't think she means あなた can't like a famous person. Yes I think あなた should tell her because I really don't think she would care honestly.
I think sincerity is everything to be hɑppy in every relɑtionship! I don't believe thɑt your mother be upset with this informɑtion! Probɑbly she gives this exɑmple for people of their sociɑl environment, not including fɑmous people! I'll give あなた my own exɑmple, my fɑther is very jeɑlous with me, but mɑkes jokes thɑt I dɑting Hɑrry! hɑhɑ
Your mum means people from school not 1D I mean for me I can't tell my mum about liking 1D because I am a boy but u can I bet it will be ok dose your mum know u have a ファンポップ account