My mind is spinning...

So.. Broke up with my high school love I spent two years with over two months ago. This whole time he has been treating me like crap. He is doing every thing in his power to get me back/get back at me for "breaking his heart". 
I'm being thrown through a loop... He won't stop messing with me. He tells me I been blabing how much he was an awful guy to everyone... I don't talk to many people, only few here at college with me, my coworkers, and my online friends. Only thing I can figure is he is stalking all my media... I'm scared... I have to make new accounts to hide from him... I'm terrified of him right now, I have no idea how to deal with this... I hurt enough on my own he makes it ten times worse. I'm told I was not there for him when i was, told I made him feel worse cuz I wasn't doing my job... What if he's lashing out because he's spreading shit? What if he's lashing out because he knows he's digging a hole? I'm so confused, hurt, and mad. But I am gonna start letting it roll off my shoulders. He needs to not have any control over my life, I can do better than him, WAY better.