It is rude to ignore friends for a relationship.
Jacob has a new girlfriend Marlene, and they are madly in love with each other.
Jacob wants to spend as much time with Marlene as possible.
Jacob brings Marlene with him to his weekly Dungeons & Dragons sessions, so she can learn to play and join in.
Jacob skips his weekly Dungeons & Dragons sessions with his friends, so he can be with Marlene.
Jacobs friends are happy to meet Marlene and have another player join them.
Jacob's friends are unhappy with Jacob for bailing so often and begin to exclude him from the group.