It is rude to not invite your boyfriend to events.
Kara is in a long term relationship and has discovered that her favorite band is coming to town.
Kara wants to go to see the band with her friends.
Kara purchases enough tickets to bring her boyfriend along with her and her friends.
Kara gets tickets to the show for her and her friends.
Kara's partner is happy to be included in her plans and see her favorite band.
Kara's partner feels left out of her plans and doesn't understand why he wasn't invited.