I made a big mistake

Hello everyone

can you please help me I am really upset with myself

I created fake account to call my fiancé and see if he will cheat me on or not and he respond to the fake name he was trying to know who is this after he introduced himself I told him everything and that was me he felt so bad and said that I did break the trust between me and him and now we can’t be together anymore I don’t if what I made was right or wrong and if he is not good I feel so bad I can’t wait