How to leave
Here we should be especially sober. Much of the literature and social media posts fall into one of two extremes: either "it's all in your head, give the person a chance," or "leave on day one at any red flag." Both extremes are bad advice. Life is set up in the gap between them.
The first thing that almost always works. Slow the tempo. Not break up, not make a scene, not deliver a verdict — simply stop matching the offered speed. If he offers to move in together in two weeks — say "let's see in six months." If he writes twenty times a day — reply once a day, without explanations. If he pressures you for an immediate decision — take three days. Manipulation does badly with slowing down, because its strength is in inertia and urgency. When you slow the tempo, you either see a normal person who agrees to wait, or you see the mask start to slip.
Second — check with one external observer. Not three, not ten — with one whom you trust and whom he hasn't managed to discredit. Once a week — a short conversation: "here's what happened this week, how does it look from outside." You don't need an opinion, you need a point of reference outside the relationship, because inside the relationship your optics will distort. This isn't a betrayal of the partner. It's a sanitary measure.
Third — about the exit, if an exit is needed. Most exits from manipulative relationships don't look dramatic. They aren't a scene with suitcases and a divorce paper. They are a slow, boring, lonely drifting away: less access, fewer shared decisions, fewer shared spaces, fewer shared people. Sometimes — a short conversation, sometimes — without one. Most manipulators don't "let go beautifully": there will be attempts to bring you back, promises of change, threats, a brief relapse of love-bombing, episodes of pity-control. That's a normal exit dynamic. It doesn't mean you were wrong about the decision. It means the techniques keep working — now for retention, not for attraction.
A separate word about safety. If there have already been threats, stalking, shoving or hitting in the relationship, the period of leaving can be the most dangerous one: control is slipping away, and the pressure goes up. A departure like that isn't announced in the middle of a fight — it's planned: where you'll live, who knows, where your documents and money are. Bring in people you trust and professionals — a crisis center or a domestic violence helpline. If you're in immediate danger, call 112 or your local emergency number. The same goes if your partner says "I won't survive without you" or threatens self-harm: saving a life is the job of emergency services, not the price of your leaving.
What doesn't work — trying to "explain" to the manipulator that he is manipulating. This rarely yields a result and almost always yields DARVO in return. Manipulative techniques exist as a way of getting what you want without bearing the costs of open conflict. Direct naming raises the costs — and doesn't reduce the technique. You aren't required to be the one who heals him. That isn't your job.
And the last thing worth saying aloud. If you recognized yourself in one of the six techniques as your own behavior — this isn't a reason for self-flagellation and not a reason to consider yourself "toxic." Each of us sometimes pulls levers, because we don't know how otherwise or because we're tired in the moment. The difference between "I sometimes break into DARVO" and "I use DARVO as a primary mode of communication" — is enormous. The useful question here isn't "do I ever do that," but "do I see when I do that, and can I stop". Seeing is the exit.