Heavy heartache

Well I thought I found the perfect person for the past one month , but sadly it was revealed yesterday that person has a partner and still wanted me. I was furious and upset and till now I can feel the pain but tears aren’t coming out . I have send a long message to him and asking him to stop messaging me. But sadly he doesn’t want and he still wants me to be his friend. I object . He doesn’t understand my heart. God , What sins have I did and what wrongdoing have I done ? Why punish me like this?? What karma have i did wrong in the past ?? Please show me and guide me .. please punish that person for what he did to me . Yours truly Heartbroken person