They have to be somebody you want to talk to
With Venus in Gemini in the 7th house, the test any partner has to pass is conversational. Attraction, kindness and reliability all matter and none of them survive a person you find dull, which is a stricter requirement than it sounds and explains several endings other people found puzzling.
In practice you are choosing an ongoing exchange rather than an arrangement. The good version of this is a relationship that keeps producing new material for decades. The bad version is leaving somebody good because a fortnight went quiet, which is a thing you have done.
Drawn to people who are still changing
A partner who is learning something, moving into a new field, or noticeably different from the person you met two years ago holds you effortlessly. Somebody settled into a final version does not. Say this early rather than discovering it at year six, because it is a genuine requirement and it sounds insulting when it arrives as an explanation for leaving.
Commitment that dislikes being spelled out
You will be devoted and you would rather not sign anything, not from doubt but from a dislike of anything that closes off possibilities. Partners read the reluctance as ambivalence and are sometimes right. Separate the two out loud: what you are certain of, and what you simply do not want to formalise. The distinction matters enormously to the person waiting.
Two chapters, and both of them yours
A common shape here is a life containing two quite different long relationships, or one that changes so much it may as well be two. Neither is a failure, and both work better if you stop expecting the second to resemble the first. What suited you at twenty-five and what suits you later are permitted to be entirely different people.
You argue well, which is not the same as fairly
Your speed in a disagreement is a real advantage and it is not a virtue. You can reframe, quote back and win an exchange with somebody who was simply upset, and the winning settles nothing. Notice when you are being clever instead of honest. Losing an argument on purpose is occasionally the most useful thing you can do in a relationship.
Say the plain version, not the clever one
You can be very funny about your own feelings, and the joke usually arrives instead of the feeling rather than alongside it. Partners eventually notice that they have never heard the unadorned sentence. Say one a week, badly if necessary. Your wit is not the problem; using it as the exit from every serious moment is what wears people down.
Two people, two systems, one conversation
Joint money works for you when it is discussed often and structured loosely: separate accounts, a shared pot, terms revisited whenever something changes. Rigid arrangements make you feel trapped and you will quietly work around them. Choose the flexible version openly rather than agreeing to a strict one you have no intention of keeping.
Learning to stay through a dull stretch
Every long partnership has months where nothing is happening, and for you those months feel like evidence rather than weather. The practice is waiting them out without concluding anything. Give any quiet period a full season before you draw a conclusion, since almost everything you have left in a flat fortnight had another chapter in it.
Your partner's relatives become your material
You take an anthropological interest in whoever you marry into: the stories, the running jokes, the things they say every Christmas. It is affectionate, and it can read as amusement at their expense. Let the noticing stay private for a while, and when you do repeat something, repeat the version that flatters them. Being found interesting by an in-law is pleasant; being found funny by one is not.
Talking is how the tension gets out
Unspoken friction with a partner goes straight to your nervous system: the sleepless hour, the shallow breathing, the mind rehearsing conversations at three in the morning. You do not brood well because you were not built for it. Say the small thing on the day rather than composing the perfect version, which is what the rehearsing is actually for.