Lately I've been feeling like breaking up with my girlfriend, I have no time to date anyone else.
What is making you think you would not want to be with your girlfriend anymore?
I wish I had time to date other women, but unfortunately I have no time for them given that I already have a girlfriend.
You are not showing your girlfriend much respect and that is very rude. You should not downplay how important your SO is.
Nobody is perfect, my gf isn't a priority.
But you should prioritize the needs of your significant other. I bet you would want her to prioritize you. If you really don't like her anymore, you should probably have a chat with her and see what you should do from there.