Feelings too strong

I've known this boy for a year last month and as soon as we met we just clicked. He became my best friend we spoke day and night and whenever I felt bad he was there. I had a few relationships through the year but I knew deep down that I always had feelings for him. we both finally admitted it and on march 7th we eventually got together.Three motnhs later we broke up amd it complelty ruined me. I have tried moving on but I just can't forget about him. My past two relathionships have ended because I went back to him and made the mistake of cheating. it never ends well being with him but I just cant move on, I don't think I can ever not be in love with him. I don't how to move on and its making more and more upset everyday...