ANSWER:

Stop all communication with the girl and repent and Ask for Allah’s forgiveness.

The sin is in maintaining such a haram relationship, not in breaking it off or in making someone cry because you stopped doing haram! If she is muslim and you both repent to Allah sincerely, you can marry her if her guardian would give his consent and approval. A man doesn’t require the approval of his parents as he can marry without it. 

I realised that i m in a haram relationship with my gf and impossible to make it halal cause of my family so i told him not to do so…we both love each other too much but now i decided to end it up and she is hurted too much crying and as i know to break someone’s heart is qabira sin so what should i do will i face the azab of that sin Plzz answer me