If you're single and seeking a relationship (a happy, healthy one I hope). Then there is one thing you have to do. You have to look in the mirror and like what you see, or else you'll always be worried that the person you're dating will find someone better. You'll always feel like you're not enough, while I understand that there's always room for improvement, feeling like you're not worthy of being loved and having constant uneasiness and resentment with yourself is what I'm referring to, which will make it much harder to feel comfortable and safe with the person you're dating.