There is a lot in these verses. Sometimes we rush to blame our partner but there may be some reason she strayed other than promiscuity. You can try to win her back with love and care if she is very dear to you. Forgiveness could be hard but it must be honest and heartfelt in order to work. Love can be very sad but a heart that has felt love can always feel there is a chance to find love again. Good luck moving on or saving that relationship.