My mom's weird actions
not sure if this is the correct place to post but idk what to do. My mother (46) and I (17) have a complicated relationship, she seems to always find a way to get what she wants. some hours ago before going to bed she asked to sleep in my room, i wasn't feeling it tonight so i told her no and maybe another time. She got mad and told me that i can't go out this weekend, its not the first time she says things like that so i brush her off knowing my bf will pick me up after work and we will spend time together either way. i do my nightly routine and as i enter my room i see her in my bed. i decide to ignore her and just go to sleep. i lie there crying because i feel uncomfy and she grabs my hand and starts like tickling me, i feel really creeped out and uncomfortable so i shed more tears and tell her to stop. she stayed quiet and got out of bed to pick up her stuff, while leaving my room she told me i can't go out this weekend and she doesn't want to see my bf near the house. i am really confused as to what i did wrong, anyone have an idea why she might act this way? any mother know why she feels the need to cross a boundary i set? she always act like this when she does not get what she wants which makes me dislike her as a person in general but i have never told her and i try to keep the peace. i have many more stories but this specific event has happened before and i just dont know how to reject her without making her go off on me, what do i do?