Why can't I control myself and always want to check my husband's mobile phone? What should I do?

The best answer is to keep a proper distance! Distance produces beauty, which also applies to couples. Farewell is better than marriage! If you can't help being angry with your husband, you can tell yourself that I can't punish myself with other people's mistakes, and I can't punish others with my own. What's more, what you want to punish is your husband, who has used it all his life!