I'm going to play this game with my gf
Why do you want to play that game with her?
She was interested in playing the game so I'm gonna play with her.
I'm jealous of you two!  That sounds like a great way to spend some time together, which is something any good couple should do!  Kudos!
I'm not a fan of this game and I don't like playing it. I'm getting kind of tired playing this with her now.
Even if you don't like the game, you still sometimes have to play if your girlfriend likes it. Relationships are about give and take.