It's wrong to just ditch your friends for other people.
Jan is at a party with her friend when she meets a new person she finds interesting.
Jan wants to go over to the new person's house.
Jan invites her friend to come along to the new person's house with her.
Jan goes to the new person's house leaving her friend at the party.
Jan's friend feels included by Jan and has a good time at the person's house.
Jan's friend feels abandoned by Jan and that Jan values the new person over them.