More alike than they look
Astrologers traditionally give both signs to Saturn, the planet of limits and responsibility, and this pair often shares more than expected: a cool head in a crisis, a dislike of being emotionally pushed, and a seriousness about their own ideas. Capricorn respects how far Aquarius is willing to think. Aquarius, who distrusts authority on principle, is surprised to find they can trust someone who actually does what they promised.
When they want the same result, they can be a very effective team, one making the change and the other making it stick.
Tradition at the dinner table
Their disagreements often begin with something like a vacation. Capricorn thinks we go to my family’s at Christmas, since that’s what you do. Aquarius wants to know why, and has invited some friends who’ve got nowhere else to go. Capricorn feels embarrassed, while Aquarius feels boxed in. Then both argue on principle, calmly, and with total confidence, and neither is moved.
Warmth can be scarce too. Each is inclined to keep feelings private, and so both might think the other’s fine, right up until one of them says they’ve been lonely for years.
Letting each other be right sometimes
Try sorting things into what must stay and what’s up for experiment. Capricorn gets to keep some traditions without defending them. Aquarius gets to try new ways in other parts of life, with no eye-rolling. Say something affectionate in plain words at least once a day. It doesn’t have to be poetic. It only has to be said.
Their Suns sit next to each other with no easy angle, so any warmth tends to come from the Moon or from Venus. Saturn conjunct Venus might deepen the seriousness of this bond, while a warmer Venus in Leo on either side could change how it feels day to day.