Can I have my girlfriend keep / maintain a job despite me getting a significant raise?
Are you sure your girlfriend needs to work so hard now? If she wants to that is.
Because I want to spend more time with other women
You have a need to be with other women, so you should break up and date them instead, it is simple to figure out.
I'm a weak man and I need the validation from others. It's just a habit.
Your girlfriend is supposed to be your rock and being dishonest with her will make it all crumble.