ANSWER:
This is Satan messing with your mind! Pre-marital relationships are totally prohibited in Islam and you are sinful for having anything to do with him in the first place as he was non-mahram to you. The fact that you are hurt could be a result of your own sins. You must repent to Allah while showing deep remorse and sincerity and move on. Part of your repentance is to be remorseful and to forget him and everything he stood for.