You shouldn't refuse to meet your friend's partner.
John and his lifelong best friend are having a conversation on the phone about his best friend's new girlfriend.
John wants to be clear with his friend.
John explains to his best friend that even though he feels uncomfortable meeting his new girlfriend, that he will do it for him.
John explains to his best friend his true feeling in that he has no desire to meet his new girlfriend.
John's friend thanks John for understanding and appreciates that John will step out of his comfort zone for a friend.
John's friend his hurt that John doesn't want to meet somebody important to him.