It is the sense that an other decision may be better, whether it be a relationship, a job, or a buy. Having said that, it's natural that the "grass is greener mentality" is quite widespread in dating, relationships, and marriages. It's human to want what others have and think that our own situation would be better if only some things were different. Of course, the reality is that no one can make you feel good about yourself or your life. If something is missing in your relationship, it's not because there is something wrong with you, but because there is something wrong with him or her. Only you can decide how you feel about yourself and your life. No one else can do this for you. The important thing is that you feel comfortable with yourself and your life. If you are unhappy with something, work on it until you are satisfied. Don't expect someone else to make you feel good about yourself if you aren't feeling confident in yourself already. In conclusion, yes, the grass is always greener in relationships. But that doesn't mean that you should compare your partner to everyone else. Instead, focus on yourself and your needs. Then go out and find someone who will make you feel good about yourself.