I'm going to tell my girlfriend she can't come to New York with me.
Why would you want your girlfriend not to come to New York?
I think she has problems with the fact that I go out too often
Since you are in a relationship, it's important to spend quality time with your partner and not dictate what they can and cannot do as that is wrong and controlling. Quality time includes taking trips and spending them together can be a special and memorable experience. You should allow your girlfriend to accompany you on the trip and also talk with her about the issues she has about you going out too often.
My girlfriend is so annoying. I'm going to cheat on her and make her feel bad.
It is wrong to cheat on your significant other because you are mad at her. If you aren't happy in your relationship, break up with her so you both can move on.