Should I say sorry

I talked to this guy for 4 years and for the entire time I just thought to myself that he couldn't be more perfect than he is right now. And he was my first kiss and my first love and we promised each other that we will never leave each other even if we got into fights. Years past and he lied to my face a million times and I still loved him but the day I finally did something with him, the exact day I found out he had a girlfriend and it was one of my best friends from 4th grade. My heart was torn to pieces and all I can think about is how much I still love him. I stopped talking to him after that and he changed on me and ended up telling all his friends on Twitter what we did together and he called me a hoe in front of everyone. But I don't know why I still love , I see him everyday in the hallway and I want to burst out in tears because I love him so much and I've done everything for him, I've done his homework his projects even though I was stressed out about my homework. I even missed a day of church to do his homework and I just can't believe he's with another girl After all the things I've done out of love but sometimes I wonder should I say Sorry to end the beef