I don't want to split my credit card points with my partner
Why wouldn't you want to be split things evenly?
It's my money, and I don't even want to share it, I want all of it. How selfish can I be?
I understand you worked hard for your money, but it is good to share with your partner.
I don't want to share with her at all.
I think your girlfriend will get mad at this and it could cause problems. Can't you talk to her about this and come to an agreement.