Engagement

Dear Sir, I broke my engagement due to girl behaviour, she have a boyfriend and told me it's difficult her to forgetting her boyfriend and ask for help from me, I told her it's Ok no problem but one day she compare me with her boyfriend and told me that there is no difference between boyfriend and husband So I broke the engagement and inform her parents via her relatives and middle women Engagement done in April 2015 and marriage in February 2016, there's no dowry take place in engagement, Is there any legal case against me Because her mama say that they will file a case against us.can I use what's app chating as proof for breaking the engagement