We have been breaking up and getting back together since four years now, he makes me believe if i go his way were gonna be together for good... every time i change for him he creates an issue for him to walk away for few days then come back.. i think hes using this method  to get out with other girls, he told me he is only doing this for me not to over-react, but how can i be calm after him leaving me for few days not answering my messages or calls ?! 

Frankly i love him but i donno if hes only using me ?

any advice?