cant believe

My roommate tired to sleep with my boyfriend. She sent him all this messages trying to get him mad at me so he would cheat on me. My boyfriend told me as soon as it happened and then told he that he couldn't talk to her anyone more because he loves me and cares about me to much to ruin our relationship. Then after that she messaged our group chat and said that my boyfriend made her feel uncomfortable and that he wasn't allowed to come over anymore. Then she threated to talk to our RA about it if i had him over again....we are grown women in college. She acts like she is in high school.