What can i do to help my break up sadness?

About 3 weeks ago my boyfriend of a year broke up with me. He said he hadn’t loved me for a month and that he was fixing to be in his busiest season (with soccer). I absolutely cannot get over this man, i have never loved somebody as much as i love him. I really think he is my first true love and my life has been tearing apart. I’m sad all the time and i just put on a front when I’m out in public. I can’t get over him and i find myself trying to be happy and get my mind off of him but I can’t. I love him dearly but he doesn’t love me. About a week ago he came to my house and got the rest of his belongings and he made out with me. We even had sex... I don’t know how to feel anymore especially because he told me he’ll never love me ever again and that i just need to move on.. if y’all could help give me tips on what to do because I’m so tired. I’ve lost so much sleep and I’m just so depressed.. he treated me so good and i miss him so freaking much