Why call me just to be a jerk?

Well we broke up in October after 3 years and she got new boyfriend the next day. After I begged her forever and I regret it. She was a total jerk. Well I quit haven't talked to her in a week. I felt alot better well I answer her call of course she wanted to see "how I was doing" I was like fine then she tells me she went here Friday with her boyfriend and chatted on skype with her friend to another guy it was bullcrap. It was wrong. Well she still being a jerked. I asked what was wrong and she I got to go I said okay bye not in a jerky way but she did? So what's the point? Really?