Why does everything he say hurts me? Will he ever me back? What do i need to do? Someone please help me.=*{?

me and a boy went out for 5mouths and i lost it to him and he lost it to me and that wuz that.i knw he loved me very much and i loved him too.he left me for a nother girl about 2mouths ago and they went out with her for about 1mouth and 2weeks and now i dnt knww what to do beacause theres not a day that goes by and i dnt think about him.i dnt get why hes doing this to me? today my friend asked him if he still had feelings for me and he said no.the girl he left me for he cheated on her for two times with me.its killing me and he knws how i feel about him.im so lost about 3weeks about he called me and asked me when me and him were going to hook up again and it wuz like 3in the morning and i dnt reamember everything he wuz telling me and then the next day he called me acting like he never asked me that.now he does not even talk to me and like i said its killing me and i feel like im dieing without him.Today he went out of his way to p by my house and this like that.do i wait or wait?