Relationship

I've been in an relationship for over three years with a man that I fell head over heels for when I was 17. We've had so many happy memories- like going on to New York City, prom, both of our graduations, the first time we said we loved one another, the first night he spent the night, going to his brother's wedding three weeks ago, etc. He's also been abusive (emotionally) and it crushes me. The other night, he yelled at me the entire way down my dorm hallway between the separate dorm rooms, down the elevator, and in the lobby, even though I begged him to stop. There was a floor meeting that was being held and the entirety of another floor heard him calling me a liar and saying I didn't tell the full story of crap and stuff. To make things worse, I have developed strong feelings for this women I go to school with. She's funny, lively, sensitive, sweet, adorable, and can automatically become zen around her. We both want to be together so badly. Last night, she learned and saw my boyfriend's behavior and decided to spend the night. We stayed up until 5am, talking non-stop. At the end of the night, we held hands. I wish something in my life could be smooth. Oh, to make it more awkward, she's my boyfriend's acting partner and is the daughter of my professor.