When trust is broken, it takes time to rebuild. If you are the one that has broken trust, you can’t be too transparent going forward. Trust is rebuilt by being transparent and being trustworthy consistently over time. A new set of agreed upon boundaries need to be in place. Trust is also a choice. If trust has not been broken and the lack of trust is built on fear and insecurity, a person has to see that the fear is unfounded and has to begin to choose to trust. One can help their partner overcome this fear and insecurity by patiently giving them the assurance they need. The worse thing you can do is tell your partner how ridiculous they are. This only compounds the issue.