Guide needed to save my daughters marriage

The groom family came through a site to see my daughter n after all the details of the points needed for marriage got accepted by both parties and as the grooms family requested for early marriage we got the marriage done as per the rituals n receptions but from the third month my daughter started feeling as if she was kept aloof from all the matters of the house n also on the pretext of being unwell the boy started to keep their bedroom door open n sleep,the boys parents too live in the same house the boy never spend any quality time with her n if she asked him he always kept saying he is busy with his office work n even the boy stopped interacting with us the (the girls parents n family) now he says we are not compatible so we should separate from each other its not even one year of the marriage . My daughter is very emotional n has followed all the rules n system they had in their house she doesn’t want the marriage to break but the boy looks like without any reason or fault of her wants her to break the marriage. I am very confused how to go about this please quite us.