estrange -
arouse hostility or indifference in where there had formerly been love, affection, or friendliness; "She alienated her friends when she became fanatically religious"
modify,
alter,
change make less severe or harsh or extreme; "please modify this letter to make it more polite"; "he modified his views on same-gender marriage"
drift apart,
drift away lose personal contact over time; "The two women, who had been roommates in college, drifted apart after they got married"
wean gradually deprive (infants and young mammals) of mother's milk; "she weaned her baby when he was 3 months old and started him on powdered milk"; "The kitten was weaned and fed by its owner with a bottle"
estrange -
remove from customary environment or associations; "years of boarding school estranged the child from her home"
