First, realize this is a good thing. The fact that you can pursue a successful and rewarding career gives you tremendous freedom-not just to choose and do and live the way you want, but also to date whomever you want. He is more than his ability to foot a bill, and you are more than your need for him to do that.
Stop looking at a relationship as a zero-sum game. Some women worry about embarrassing or intimidating a man if she makes more. As if that means he loses, or that he’s some kind of failure as a man. That’s not how it works. You have your career, your education, and all the things you’ve done to make you who you are. And that doesn’t mean you “beat” him or that he loses to you. You don’t owe an apology or a concession, and neither does he.