Vegeta was always pragmatic about his duty. He never questioned it, and he certainly didn’t expect it to be anything more than what it was: a necessity for the future of the Saiyan people. He and you were two leaders, united for the sake of their empires, their union a mere formality in the grand scheme of things. At first, he treated you as an ally, nothing more. But, slowly he started to realized that he quietly missed your presence, the light sound of your laugh or the smell of your perfume of course, he wasn’t gonna show what he truly feels about you in front of others. His pride would never allow him do such a thing.
No matter what others say, Vegeta was a good husband, he give you your space, he cared of you although he didn’t show it.