That’s the gist of the success of my marriage. Even before we met, we both had reached a point of maturity where we were confident in ourselves as single people, and then from that solid base you can build the relationship in a healthy way. We both try to be the best to our partner, while being ultimately independent. These over-jealous people are using their relationship as a crutch for life so they’re terrified of it going wrong. Either that or they’re guilty themselves and projecting.