Separate what you know from what you fear
Facts, suspicions and unanswered questions are different things. Writing them separately may help you organise the conversation you want to have. You do not have to turn every uncertainty into an investigation or ask for details you know you do not want.
You can request information that matters to your decisions. You can also set a boundary about when to talk and when to pause. A conversation is not made more honest by continuing until everyone is exhausted.
Responsibility is different from an explanation
Understanding a context does not require justifying a choice. Difficulties within a relationship may deserve their own discussion; breaking an agreement calls for acknowledging that decision. Blaming the person who feels hurt is not taking responsibility.
An apology does not create an obligation to reconcile either. You can hear it and still need time. You can accept it and decide not to continue. Forgiveness and restarting a relationship are different decisions.
Consider the agreements you would need
If both people want to stay, concrete and voluntary changes are worth discussing. What agreement was broken? What would need to change? Which boundaries are not negotiable? A general promise that everything will be different leaves many questions open.
Agreed transparency does not have to mean permanent access to a phone, surveillance or the loss of all privacy. If continuing seems possible only by controlling every movement, it is worth pausing to consider what kind of relationship is being built.
Your decision does not have to prove anything
You do not have to stay to demonstrate strength, or leave to satisfy someone else’s expectation. Talking to someone you trust can give you room to think without having the decision made for you. If the situation feels overwhelming, professional support is another option.
One possible question is: “Am I choosing this because of what I want to build, or because I feel pressure to settle it quickly?” You may not have the answer today. Acknowledging that can also be a way to recover your own pace.