How can I stop being insecure in my relationship?

You can discuss your concerns with your partner. Let them know how you are feeling so that they can understand where you are coming from. When you discuss your feelings with them, they will be more cautious of how you feel when you are with them.

Talking about how you feel is the main key. Doing such thing is not trivial for lots of people, but being honest and telling the partner (or friend, or relative) about how you feel is crucial. Opening yourself and revealing that you feel insecure is not easy, but once you do it, it is easier to come up with solutions about things that you feel insecure about. After that, working on getting more secure is essential. Make a journal about your feelings related to insecurity: what are their cause? What can I do to fix it? Am I overthinking things? Am I seeing things the way they really are? Tracking intrusive thoughts that may bring you insecurity and anxiety is a good idea. If you feel comfortable enough, bring them to your partner. Keep in mind that being honest is one of the most important keys to every relationship, and it is an important factor related to dealing with insecurity.

The best way to stop feeling insecure in any relationship is to learn to love yourself. Although it could be a little confusing at first, you could take your time to get there. Another helpful way to stop insecurities is by building a deep and great bond with your partner. As long as you two are able to speak your mind to one another, no doubtful or vulnerable thought could make its way between you two.

I've learned in my own relationship that the key to being more secure is to frankly be open and honest with your partner. I've had my fair share of insecurities in my relationship, stemming from my depression, past abuse, failed relationships, and just the fact that I'm disabled. But my fiancé and I talk whenever I'm feeling insecure about whatever, and we work things out, and she makes sure I'm secure in our relationship[, and that I know I am loved, despite any perceived flaws I may have.

I would initially assume that the underlying problem is a self-esteem issue. Confidence is probably the most important trait to gain in order to be more secure about yourself and your relationships with the people around you. Don't be afraid to try things new, and if you ever are questioning what your partner is thinking, don't be afraid to ask them!

Ask yourself why you are insecure, if you are being irrational work on your anxiety, open yourself up to trusting someone and face your fears... remember I got 99 problems and 95 aint real! ... if you have reason to distrust or be insecure than perhaps its time to re-assess what keeps you in the relationship.

If your boyfriend/girlfriend is giving you a hard time, talk it out! If their friends are making you feel uncomfortable, again you can either talk it out or start being more confident. Your partner chose you for a reason!

COMMUNICATION IS KEY! Talking to your loved one can really help to eliminate any and all insecurities you may have. If you or your partner do not know what the other feels, you'd never be able to fix those insecurities.

You are you, and there and there is really not much you can do about that but just remember that the person you chose is with you for a reason, no one is like you.

Insecurity can be overcome by learning to trust in being yourself and not reading too much into something and seeing an issue that isn't there. You got into the relationship for a reason. Don't speculate about negative things because the more you think about something, the more issues you could convince are there when they really aren't. You have to trust in the relationship and feel free to talk to your partner openly.