You should avoid breaking people's hearts.
Tom is not really feelings Janice anymore as their relationship has gotten stale.
Tom wants to break up with Janice.
Tom calmly discusses his issues with the relationship with Janice and says they are not right together.
Tom very harshly dumps Janice, telling her all the things about her he does not like.
Though she is upset, Janice takes the breakup well and moves on.
Janice has her heart broken and she is very upset.