Couples who have been fighting for years often assume the task is to start communicating again, as though the skill has gone rusty and needs oiling. That is not quite the situation.
After years of conflict you are not starting from zero. You are starting from below it. Both of you carry a long file of evidence about the other, and both of you enter every conversation already braced. Long before anyone speaks, each of you has predicted how it goes. Most of the damage happens in that prediction, not in the words.
Which is why the instinct to finally sit down and talk about everything is usually a mistake. A four-hour conversation about the whole marriage, attempted by two people with no working repair skills, reliably becomes the two hundredth round of the same fight and sets you back another six months.
Start much smaller than feels satisfying.
Repair before content. Before you touch any of the actual issues, you need one reliable way to stop a conversation going wrong and get back to neutral. A word either of you can say. An agreed pause of twenty minutes with a stated return time. One sentence — that came out worse than I meant it — that either of you can use without it counting as surrender. Couples underestimate this because it feels like avoiding the real work. It is the precondition for the real work.
Then rebuild predictability. Trust is not restored by a large gesture; it is restored by small things happening the way they were said they would, repeatedly, until the nervous system updates. Fifteen minutes at the same time each evening, phones elsewhere, no problem-solving allowed. It will feel stilted for about three weeks. Keep going. The point is not the conversation, it is the evidence that you both show up.
Only then take on the substance, and take it one item at a time — the smallest live issue first, not the oldest wound. You are building a track record of getting through something together, and you need a few of those in the bank before you attempt the hard ones.
Two things about timelines. It takes longer than you want, usually months rather than weeks, because you are updating a prediction that took years to form. And you should not expect to feel close first — behaviour changes before feeling does, most of the time. Waiting to feel warm before acting differently is the most common way couples stall.
The sign that it is working is not the absence of disagreement. It is that disagreement stops being dangerous — you can raise something difficult, have it land badly, repair it within the hour, and both of you know the evening is not ruined. That is what a functioning relationship looks like from the inside. Not fewer conflicts. Shorter ones.