again and again -,-

i dont know what to say, i dont know what to do. ive broken one heart and now i broke one again. with the same problem, the same situation, the same pain. when ive loved someone very much, he made me angry, made me jealous, made me sad, made me cry. he really made me out of my mind. then i was sick of that and suddenly lost my feel to him (i was so glad to feel that because i thought i will never let him go) so i walked away before i fall for him again. i really broke his heart and i swear i wont break a heart again. days after that was reeeally hard times. now when ive liked someone else, he did the same things. he made me angry and sad. i felt like loving the same guy again. then i lost my feel to him and i want to walk away, but i dont want to break a heart anymore SO WHAT SHOULD I DO?