Speaking with your partner about your feelings is the first step. Being frank and open with them is crucial. Your relationship will be stronger the more you can talk to each other.
Try talking to your partner about anything that's specifically triggering you, like when they spend time with someone else.
One of the best things you can do if your insecurities are related to low self-esteem is to work on increasing your self-confidence.
In any relationship, communication is one of the most crucial elements. It's important to be honest and open with your partner if you're feeling insecure. Explain your feelings to them.
It's critical to communicate your trust to your partner. This entails giving them your support even if you disagree with everything they do.
Comparing yourself or your relationship to others is one of the worst mistakes you can make. This will only exacerbate your insecurities and make you feel worse about yourself.
If all you've tried doesn't seem to be helping you get over your fears, it may be time to get professional assistance. Counselling or therapy may be used for this.