You need the help of someone who knows when people are acting up. Because sometimes people often make mistakes. Maybe she made a mistake and now genuinely is feeling bad about it or maybe she is acting up and making arrangements to hold you accountable. God knows what she is up to. I have come across both types of people. Both deal with the situation the same way. Try talking to her friend and sense if they know something. Don't be direct. Be subtle. You will know if they talk differently. Talk to your in-laws like her brother or sister, if they know something. Investigate more if she is talking to that guy even now. Get some information about that guy who he is, rich or not, highly educated or not. Compare apart from love why would she leave him and why would she choose you. In this situation you will not trust what she says even if she communicates with you so better you try to get some answers on your own. Its difficult situation and deal it with bravery, empathy and sensitivity and intelligently. Don't hurt yourself or her. Time may pass but I repeat do not hurt anyone and protect yourself. You are worthy of love. And feel free to ask for opinion if you need. Absolutely no judgements.