What should i do, i have no idea how to handle this?

How do i finally accept that my relationship with my ex might really be over? I love him dearly we always break up and make up because of his infidelity i am faithful and i treat him like a king but he keeps hurting me. I found out he had unprotected sex recently with a girl and i dumped him. I am so disgusted i feel like it is really over this time. But how do i accept that? It is very hard for me to admit it is finally over after years of being with him. We have been apart for almost three months and it is still a hard pill to swollow. Please help... How do i finally accept that it is reallt over this time? I still love him he was my everything