Does Venus square Uranus mean commitment is impossible?

No, and a description that says so has turned a preference into a prohibition. What the contact describes is a cost: closeness arranged with no room in it tends to get interrupted. Closeness arranged with room in it is not obviously harder to keep than any other kind.

Why do the attractions burn out?

Often because the intensity belonged to the beginning rather than to the person, which is worth testing rather than assuming. The same shape is produced by novelty, and by finding out quickly that somebody is not who they appeared to be.

Is a transit the same as having this in a birth chart?

No, and the two are easy to confuse because they are named identically. A transit is a season. A birth chart contact is a standing disposition, and this page describes the second.

Aspect

Venus square Uranus

Venus square Uranus wants closeness and wants to be unbound, in the same moment rather than in turn. Venus is what attracts and what is judged worth having. Uranus is an outer planet, and what gets read from it is interruption.

The simultaneity is the whole difficulty. Wanting two things one after the other is a life. Wanting them in the same breath is a temperament.

Two appetites, one moment

Venus is a personal planet, and it is given a specific office in matters of love: eros, magnetism, and what a person finds worth having. Uranus is classed among the outer bodies, found long after the classical tables were set and never written into them. So what meets here is a private appetite and a pressure with no stated address at all.

A square holds them at odds in the arrangement that permits neither a merger nor a clean alternation. What that produces is not a person who wants freedom instead of intimacy. It is a person for whom the arrival of intimacy is itself what produces the need for room — on the same day, sometimes in the same conversation.

This is why the pattern is described from outside as inconsistency and from inside as nothing of the kind, and why both accounts are accurate. The inconsistency is real, and it is not indecision. It is two appetites at full strength with no mechanism for taking turns.

How it tends to show up

Attraction that arrives at speed and is strongest before anything has been agreed.

Needing more room precisely when things are going well, and being unable to account for the timing.

A long record of unconventional arrangements, defended on principle and chosen on instinct.

Boredom that behaves less like a mood than like an alarm.

What changes the reading

A square’s margin is wide enough that many charts qualify for one. Only the close ones behave with the abruptness the description implies.

Uranus stays in a sign for years, so the sign belongs to an age group rather than to a person. The house it occupies is where the interruptions land.

Anything in the chart that rewards continuity changes how this is lived without changing what it is. It becomes a pattern somebody manages, rather than a pattern that manages them.

Questions

Does Venus square Uranus mean commitment is impossible?: No, and a description that says so has turned a preference into a prohibition. What the contact describes is a cost: closeness arranged with no room in it tends to get interrupted. Closeness arranged with room in it is not obviously harder to keep than any other kind.
Why do the attractions burn out?: Often because the intensity belonged to the beginning rather than to the person, which is worth testing rather than assuming. The same shape is produced by novelty, and by finding out quickly that somebody is not who they appeared to be.
Is a transit the same as having this in a birth chart?: No, and the two are easy to confuse because they are named identically. A transit is a season. A birth chart contact is a standing disposition, and this page describes the second.