Is it normal to never argue in a relationship?
Yes, some couples rarely or never argue, and that can be perfectly healthy. What matters is whether you can be honest about disagreements instead of avoiding them to keep the peace.
Some couples genuinely have similar values, communicate well, and work through differences without things turning into arguments. A disagreement doesn’t have to become a fight, so “we never argue” can simply mean you handle conflict calmly.
It’s worth asking whether both of you feel safe speaking up, though. If one or both of you swallow concerns, pretend to agree, or worry about the other person’s reaction, the lack of arguments may be avoidance rather than harmony. You don’t need fights to prove a relationship is real—but you should be able to talk honestly when something’s wrong.