It takes days and months to build trust. It is essential to know well about the person you'll entrust with your feelings while both of you delve into something to be developed called love. When trust is fully rooted in one's belief and feeling, there's no second thought that a lie may occur. Once trust is gone, it will be lost forever. There will be no second chance. I don't know in your case if you could give a betrayal a second chance. For me it's a big NO.
