You want to be yourselves in this relationship, and go about your life in the way you're used to or the way you see fit; but somehow, your partner's work gets in the way of you being completely and uniquely yourself. Maybe they have a career that requires them to travel a lot, or wine and dine clients while you're left at home, lonely and wishing you were there. This is the type of conflict that the two of you encounter as a couple, but the tension of the situation might not become apparent or really much of a problem until well into the relationship, when your individual needs become more important.
It starts to come out at that time. Your lover actually might place more importance on their career than on your romantic relationship, and for them, that's okay -- it's a choice they've made on purpose and with a clear head. But for you, it could be heartbreaking! Some sensitivity is needed. If you want to work this out long-term, you both have to make adjustments in what you expect from each other. Finding some middle ground is necessary. Don't try to work together, by the way; you'll both find that it's more trouble than it's worth, when one of you has methods or intentions that go against the other's goals. Keeping things romantic between you takes some work and planning on both your parts.