Please read this....?

so i went over to this boys house that i talk to. and he was trying to give me a hickey but i stopped him bcuz i didnt wanna get in trouble. so i left bcuz he was going too far and when i got home my mom noticed a tiny but noticable hickey. at first i denyed it bcuz i didnt wanna get in trouble.. but then my mom told me she was losing my trust and now she doesnt let me go anywhere, not even to hang out with my guyfriends. how can i gain her trust back