My excessive jealousy once damaged my spouse's trust. How do I rebuild it?

Rebuilding trust begins with honestly admitting your mistake, not defending the jealousy. Apologise specifically for the accusations, snooping or control you engaged in, without excuses. Then show change through consistent actions: stop checking, start trusting, and control your reactions. Give your spouse room to heal; trust recovers with time, not with pressure. Deal with the root of your jealousy, whether insecurity or an old wound, with help if needed. Celebrate small progress together. A spouse finds it easier to trust someone who is clearly changing. See counselling.