Bitchy mother

So my fiancée and I broke up on Monday and my mom has been a bitch to me ever since then. When I told her she made a comment about how even though we're broken up he needs to pay for my schooling still because he lived here rent free for 6 months. When we first moved in we offered rent money and money for groceries but she wouldn't take it and we offered maybe times after that but now that we're not together she thinks he owes me money because he didn't pay rent. And then today is my little cousins birthday party and I didn't go because I didn't feel like dealing with family and 1,000 questions about why Anthony and I broke up I just wasn't ready for it and as she was walking a away she muttered under her breath "fine lay in bed all day waisting your life and being a piece of shit". I really just don't know what to do I don't know what I did to be treated this way. I don't lay in bed all day everyday I'm very productive and she's just treating me like shit when she knows I'm having a hard time.