I fell in love with a commited man

he was in a 4 year relationship when we met. meeting him was one of the best nd the worst thing happened to me .now I think that but he was it man .it started with frnd ship you don't know how pure nd amazing it was .j us together.the love we had for eachother wasn't like bf or gf it was j pure love . he made so many promises nd stuff that he will never leave or wot but . some stuff happened nd now we can't be together. nd after losing him as my frnd . I hv now realised that I love him . nd I miss him so much.alk day or nyt. I j think abt him . nd the memories they keep me up all night. we are in a non contact suitation so I can't even text him nd tell him all this . I miss him so much. I can't seem to let go nd move on . help me