You shouldn't break up your partner's friendships.
Jess is dating John and doesn't like that John spends every weekend with his friends.
Jess wants to spend more time with John.
Jess asks John if they can spend more time together on the weekend.
Jess tells John's friends that he can't spend time with them anymore.
John agrees, and they plan for a date night on Saturdays.
John finds out, gets angry with Jess, and breaks up with her.