Confusing situation? plz help?

i have known my bestfriend who is a guy for going on 6 yrs now, i have dated him in the past and we have stayed friends since our break up which was 4 yrs ago. we had been fine with our relationship and everything was normal but then he started dating another girl. to make **** short he had problems with her and then asked for my help so i did i was dragged into their relationship alot and helped as much as i could but then it worked its way against me, he started to hate me say mean hurtful things tell me to back off of his girlfriend as if i was another guy. so we were off and on again bestfriends because he would always call it quits when he felt something was in his way, and was kinda always and egotistical bastard during this time. anyways we didnt talk for along time and then he started up his facebook again after he moved states and asked me to be his friend so i started talking to him again, we hit it off like usual and were instantly back to gether as bestfriends talking on phone every day for hours getting on xbox for hours just to talk and game it up. then it started to become more then talking, we were flirting asking when wed see each other again, and we both cried because we have missed each other. so we were kind of in the sense of the word going out , but long distant so it was wierd but felt good. i have not done this guy wrong and hes appologized and acknowledged his wrong doings to me and i have loved this guy ever since i met him so it was easy for me to forgive him. anyways we did this for acouple months and then i didnt hear from him for a week or so. i didnt really call cause he worked and i didnt want to bother him during work. also he couldnt get my text. anyways he calls me up and says we hadnt talked in a while and he was happy cuz "supposably" he had a new girl friend , i was speechless i didnt know what to do so i pretended it was nothing but then broke down to him and like always he appologized to me and swor he never meant to lead me on but then went to say we were kinda dating. so it was what ever we stayed best friends. but all he does any more is tell me about him and his girlfriend and how he needed help wanted me to talk to her and help her understand him and get them to have a stronger relationship. i hate this though because i am deeply in love with this guy and hes asking me for help for other girls, but i do it anyways because i love him and want him to always find help from me. but i am not sure i can take this anymore , he told me today after he put me on hold for 30 mins that he really wants to make this work with this girl and wanted to talk tomorrow. anywho idk what to do i am madly in love with him and he feels a love towards me that confuses me, but always tells me how much he misses me and that he loved me, - of course now its like brother sister. should i stop being friends with him or what i dont have the guts to tell him.