How can I stop being insecure in my relationship?

One good way to stop being insecure in relationships is to know that whatever the other person does is not about you, it's about them. Continue to focus on what you want in life and who you are, and ask yourself if the person you're with is helping you move forward or causing you to move back.

try not to think that the relationship is all about "you". don't feel paranoid over nothing. stop being dependent on anyone but yourself

Always be up front with your partner- if you have concerns, ask them. You shouldn't have to dance around your insecurities in a relationship :)

Focus on your positive aspects and your strengths; recognizing that none is perfect and there are challenges and obstacles in every relationship

talk to your partner and try speaking about why you fell insecure, and just talk to them try to figure out things you find unconfutable and explain this to your partner.

Once you realize that you're a beautiful human being with a charming personality you will realize that may, just maybe this person that you're in a relationship with is within the same "league" as you and that you should have nothing to be insecure about.

Clear and open communication is important in any relationship. If you have insecurities, it's best to discuss these with your partner, and together you can come up with solutions for how best to reassure your anxieties.

Trust and Faith in yourself. Knowing you are doing your best to make the relationship blossom is all you can do. If you don't take the leap of faith and trust in yourself, your relationship will wither. If you are feeling insecure, identify WHY and ask yourself if this person is the reason for your insecurity or is it something else. Insecurity is normally the by product of a past issue, yet we allow those insecurities to dictate our future relationships and how we react to normal situations in erratic ways. (ie "I texted him, he didn't text me back, He MUST be cheating on me! That's how my last boyfriend did me!" So, now, some poor fella's probably trying to take a poop and his girl keeps on blowing up his phone because of how her last boyfriend was, now he gets to suffer with her insecurity).

Talk w/ your boyfriend/girlfriend about your insecurities. A good relationship needs trust. Be happy

I'm always an advocate of open and honest communication with ones partner, talk to them about what your concerns are.