Have u experienced this

I am 18 and my roomate she is 25 working in it , so like i came from a small town and she is from modern family grown in city , she is daughter of my mother's childhood friend and we both are living in a flat. So like I share her many things she advices me and its over 6 months we are living together, so I am kinda introvert and she is extrovert and like everytime she takes initiative to talk or do smth. She spanks me a lot and do little dirty talk randomly , so at first It was weird but now I am used to it . And she drinks a lot go to parties and a I had never gone to any and she asked me many time but I deny . So like when it was over a month she started doing more weird things like one day she randomly started talking about adult stuff and told me some of her stories and asked me if do u have anything like this i told no not yet , then she told me I wish i had boobs like u , I thought what is she talking about , then I laughed and she said she got a call and went away . After that many things happend and she do cuddle me sometime at night when i am asleep but she sometime cross the boundry and she do touch my boobs and ass hard and I do not react cuz I dont know what to do in situation like this . So is this common for roomates like have u experienced this . And what I should do ? Like I dont have any problem with this but is it ok?