Lord have this child of yours understand if he is unhappy and cannot trust this person, then she is not the right one for him. Just as you give us peace and joy in our heart when we serve you, so it is when we love someone if they love us back too. Uncertainty, misery, and living without trust is not of you. Help them to pray for her salvation and for the right man for her to come into her life, and help him to move on until the right woman comes into his life. One who is trustworthy and knows how to love, for not telling the truth to the one you supposed to love is not love. May he walk away before things get more complicated in their life. In Jesus precious name I pray, amen.