I feel so hurt why did my boyfriend say nasty things to me after breaking up?

That's part of growing up. You learn from it. Besides, over time...you will see that people like that have to pay a heavy price. Wait till you're older and when you find out about him.....its more than likely that his life is messed up....what goes around, comes around and you will see how that works. At this age, heartache is good, it teaches you that you are human and have emotions, later it will help u choose the right person and make that person happy. It will also help you manage your emotions better. At this point, I know it hurts a lot...but it will get better. Time is a great healer and when you are young you don't believe it...but its true. Chin up, his loss and just as well that you found out this way!!