How to get over my ex?

So basically, me and my ex boyfriend went out for 4 months and we split up 2 weeks ago because my feelings for him have changed. But ever since we split, all we've done is argue and he keeps saying quite horrible things in the heat of the moment like "you're a ****/" and he said he hated me last night. He says he wants me to leave him alone, but i always need to speak to him about something important or something thats bothering me but it always turns into an argument. What should i do to make myself feel better and get over him?