I don't want my boyfriend to go to a knicks game
Do you think he doesn't deserve to go to a Knicks game?
He deserves to get hit by a truck
It is okay to be upset that your partner wants to spend time apart, but it is okay on occasion to spend time apart on separate hobbies. It can make your relationship stronger to let them spend time doing things they enjoy without you.
Fuck, that's not going to get him out of this game.
You sound very possessive and this is only going to drive him away. Why don't you go to the game with him?