You aren't able to be very supportive of your lover's career, and that could really hurt your relationship, especially if the work your partner does is very important to them. Some people just have a job -- work that they do that they like well enough, but mainly it's to pay the bills. Other people have careers, and they involve preparation, hard work, long hours and dedication.
An intense job can definitely get in the way of a romantic relationship, however. This kind of emotional struggle between you only gets more pronounced over time. After a while, the tension is too thick to ignore. Your lover mentions needing to take a client to dinner, and you give that look -- the look that lets them know just how displeased you are. Or your lover tells you they need to take yet another business trip, and your heart just squeezes painfully. The bad news for you is that you're the one who has to make most of the adjustments, adapting to your lover's demanding career as best you can. After all, this career is something that has happened through a lot of hard work and planning, and if it were to come down to a choice -- 'It's us or your job!' -- odds are, the relationship would be the dead weight that was cut first.