Who ever gives me the best advise ill choose your answer as the best!?

so me and my first love and my friends hang out all the time so one of my friends and i were going out im truly in love with him them my first love came along and started messing with my head saying he loves me and he does so my old felling came back.i hurt the other guy bad and im always infront of my new ex so then me and my new ex got back to gether and my first love started coming on to me again and i went back with him then we broke up so i was at work and this girl kept being a ***** to me my new ex got her to shut up and stay away from me i said thankyou when i ran into him again he just looked at me confused and said ok thats it ok so i walked away we were at my friends house he came over me and my friend torrie were sitting next to each other on the couch so my friends knew what happened so torrie moved over so there was only 1 spot left on the couch next to me so he walked in and said torrie can u sit next to her and she said no and then hes like fine ill sit on the floor did i menchin hes 24! so i left cuz i had to go shopping so he told myfriends he doesnt want to get hurt anymore and hes in love with me and i finally relized im just in love with him but he still wont come back to me even though i say sorry 1,000,000 times!what should i do and he always says hes inlove with me and he never dates how can i show him i wont hurt him again?