You're a big source of support for this person's work and career. Your relationship could even take on a power-couple kind of feel, especially if you are together long-term. You take on their goals for success as your own, and you help them to develop a good public face -- wining and dining potential clients or important associates, or throwing parties to wow the neighborhood and show them that you're people to be taken seriously.
At the very least, you talk up your lover in public circles, advertising their work and their strengths to other people, always with the thought in mind of increasing their opportunities and their contacts. You're a really strong team in this regard, and as long as you keep each other motivated toward success and keep communicating clearly and well with each other about your connection and your ambitions, you stand a great chance of lasting long into the future, and at least of making a big and lasting impression on each other's lives.